Q: Nowadays animal experiments are widely used to develop new medicines and to test the safety of other products. Some people argue that these experiments should be banned because it is morally wrong to cause animals to suffer while others are favour of them because of their benefits to humanity. Discuss both views and give and give your own opinion.

In the modern era, scientists have used animals as a popular method for testing medicines and other products. However, some people believe that these experiments should be prohibited because it is unethical. Personally, I reckon that both allowing and banning animal testing have its own perks so it should be limited in a suitable level.

On the other hand, experiments on animals allow scientists to discover new medicines and products, bringing lots of benefits to humanity. To be specific, some species like rats, rabbits, monkeys,... have a large amount of similarities to humans such as genes, facial expressions,... so testing products on animals may provide the same effects as on people. Moreover, it is better for animals to suffer from pain in an experiment than for people to lose their lives due to animals’ affordable price as well as their high birth rate. Thus, animals play a pivotal role in determining which drugs are safe to be used widely.

On the other hand, some individuals are of the opinion that animals should be used as a tool in product testing because they have rights and emotions. Specifically, like human beings, animals have the right to be safe and express emotions when suffering from pain. For instance, when hurting, mice will hiss, monkeys will cry as evidence that they possess feelings like humans. Consequently, these tests are ethically wrong to be produced massively to people. However, these experiments should be limited because animals have rights and emotions.

In the modern era, (Unnatural phrase. Avoid this phrase.) For a long time, scientists have used animals as a popular (not a good word choice.) method for testing medicines and other products. However, some people believe that these experiments should be prohibited because they are it is unethical. Personally, I reckon (Informal - do not use this word as it is inappropriate.) that both allowing and banning animal testing have its (wrong form) own perks (wrong word) so it they should be limited in a suitable level. (Your sentence does not make sense. I think you meant this:

I agree that they are somewhat unethical, but sometimes they are critical for finding safe and effective cures for diseases, and for these purposes, they should be allowed.)

On the other hand, (Incorrect transition phrase) experiments on animals allow scientists to discover new medicines and products, bringing us lots of benefits to humanity. To be specific, some species like rats, rabbits, monkeys,... (Incorrect- see below)have a large amount of similarities to humans such as genes, facial expressions,... (Incorrect) so testing products on animals may provide the same effects as on people. Moreover, it is better for animals to suffer from pain in an experiment than for people to lose their lives due to animals’ affordable price (That does not make sense.) as well as their high birth rate. (wrong expression) Thus, animals play a pivotal role in determining which drugs are safe to be used widely.

On the other hand, some individuals are of the opinion that animals should be used (???) as a tool in product testing because they have rights and emotions. Specifically, like human beings, animals have the right to be safe and express emotions when suffering from pain. For instance, when hurting, mice will hiss, monkeys will cry (Ungrammatical. Missing conjunction) as evidence that they possess feelings like humans. Consequently, these tests are ethically wrong to be produced massively to people. (That does not make sense.) However, these experiments should be limited because animals have rights and emotions.

Your essay is lacking a conclusion paragraph.