Question

select the four prepositional phrases. yogurt, which has existed for millennia, did not become truly popular in the united states until the 1940s, when the dannon company added fruit to it.

Explanation:

Prepositional phrases start with a preposition followed by a noun or pronoun. In the given sentence, "for millennia" starts with "for", "in the United States" starts with "in", "until the 1940s" starts with "until", and "to it" starts with "to".

Answer:

for millennia, in the United States, until the 1940s, to it