Question

what happens if you heat a diamond to 1,405°f?

Explanation:

To solve this, we need to choose the appropriate pronoun to refer to "a diamond". Since "a diamond" is a singular, inanimate object, the pronoun "it" is the most suitable.

The noun "a diamond" is singular and non - human, so the pronoun "it" is used to refer to it in the sentence "What happens if you heat it to 1,405°F?".

Answer:

it