What is the Latin phrase for the abbreviation i.e.?

The correct answer is "Id est," which is the Latin phrase that translates to "that is" or "it is." This phrase serves as a clarifying statement or explanation, which aligns perfectly with the function of the abbreviation "i.e." in English. When someone uses "i.e.," they are usually providing further details or specifying something in a way that is analogous to how "id est" is used in Latin.

The other options do not convey the same meaning or usage. "In hoc est" translates to "in this is," which does not serve the purpose of further defining or clarifying a statement. "Ita est" means "thus it is," which is more about affirmation rather than explanation. "Intra omnes," meaning "within all," does not relate to the clarification that "i.e." provides. Thus, "Id est" is the most fitting choice for representing the abbreviation "i.e." as it accurately captures the idea of elaboration or specification in Latin.