We use THE + singular noun to make general statements about animals and about inventions and discoveries. For instance:
Who invented THE bubble gum?
The fly is a common insect.
The electron is a part of every atom.
But, a plural noun or an uncountable noun on its own has a general meaning without using THE (eg. Cars are expensive in my country / Bubble gum is harmful for your teeth.)
What d'yu think would be the answer to your question?
Cheers!