It is easier to answer this question by means of examples:
Example 1:
a. What are those colors that you see in a rainbow?
b. They are violet, indigo, blue, green, yellow, orange, and red.
Example 2:
a. I love the ones with the white icing. What are they?
b. The ones with the white icing are ginger.
The answer to your question is that they are both correct in context with the rest of the sentence.
Both "What are those?" and "What are they?" are correct questions to use when asking about a group of items or objects. Use "What are those?" when pointing at specific items that are visible, and "What are they?" when referring to a general group of objects.
Those can be a determiner eg Those people are from out of town Those can be a demonstrative pronoun, the plural form of that eg I like those over there
Those is the plural form of that. That (singular) and those (plural) are the objective form of demonstrative pronouns.
The antecedent of the pronoun "those" would be the noun or noun phrase that "those" is replacing in the sentence. For example, in the sentence "I saw the trees, and those were beautiful," the antecedent of "those" is "trees."
The plural of 'this' is 'these' and the plural of 'that' is 'those'.
No, it is not correct to say "those ones." "Those" is already a plural determiner, so there is no need to add "ones" after it. Just saying "those" is sufficient: "I like those books."
for those who are
Extremely beneficial to those.
Are those your books? Please put away those clothes. Those gifts are for my sister. How much do those apples cost? Good things come to those who wait.
those who dictate
Those can be a determiner eg Those people are from out of town Those can be a demonstrative pronoun, the plural form of that eg I like those over there
I have never heard of that saying but I have heard one that goes "Those who can do and those who can't teacher."
knon of those
these
Those is the plural form of that. That (singular) and those (plural) are the objective form of demonstrative pronouns.
With only those, there is no shape.With only those, there is no shape.With only those, there is no shape.With only those, there is no shape.
"Those" is not a verb at all; instead, "those" is a demonstrative pronoun.
Look at those cats. Those modifies cats. What kind of cats? Those cats.