We hid the ice cream underneath the frozen peas.

In the above sentence, the underlined words are ____________

prepositional phrase
predicate
indirect object
direct object

The underlined words "underneath the frozen peas" in the sentence "We hid the ice cream underneath the frozen peas" are a prepositional phrase.

To identify the prepositional phrase, we look for a preposition (in this case, "underneath") followed by a noun phrase ("the frozen peas"). Together, these words form the prepositional phrase that functions as a modifier in the sentence. In this case, it indicates the location of where the ice cream was hidden.