Ls this an apple? Yes, this is an apple. Or yes, it is an apple The answer to "this / that" is "this / that" or "it" Ah, is it or this

It's it is
If you can't think about the singular, you can think about it in the plural
Example:
Are these apples?
The answer should be yes, they are
Explain that these are replaced by them
The singular of them is it
Naturally, it is