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Hi. What is the difference?

There are various types of food/foods. Various types of food/foods will be offered here.

There are various types of fruit/fruits. Various types of fruit/fruits will be offered here.
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Of all the various types of fruit available for human consumption apples
are the most popular and widely-used variety.
This is correct.
.

Comments  
It is plural in every case because it is stated so with 'various types'. It is similar to 'Breakfast foods are becoming healthier.' And, ' Tropical fruits are more readily available than when I was a kid'. Therefore, use 'foods' and 'fruits'. Although, in casual conversation, you will hear both plural and singular. The plural form comes across a bit affected in speech, at least to an American. The British may be more formal with this use.

We're not actually not likely to use this construction in the first place.
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Hi. Thank you. Would you say this is wrong? This is one of many that I got when I did a Google Book Search (among many others) with the words "various types of fruit."


Food Hygiene‎

저자: William Clunie Harvey, Harry Hill - 1952 - 511 페이지

Apples Of all the various types of fruit available for human consumption apples
are the most popular and widely-used variety. They have been appreciated as

 Mister Micawber's reply was promoted to an answer.
Merriam-Webster does use 'fruits' in some case. Random House uses 'fruits' as a plural for a collective. I think either choice is acceptable.

Please see below.

noun, plural fruits, (especially collectively) fruit, verb

1 a: a product of plant growth (as grain, vegetables, or cotton) <the fruits of the field> b (1): the usually edible reproductive body of a seed plant ; especially : one having a sweet pulp associated with the seed <the fruit of the tree> (2): a succulent plant part (as the petioles of a rhubarb plant) used chiefly in a dessert or sweet course c: a dish, quantity, or diet of fruits <live on fruit> d: a product of fertilization in a plant with its modified envelopes or appendages ; specifically : the ripened ovary of a seed plant and its contents e: the flavor or aroma of fresh fruit in mature wine
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