What is the prepositional phrase this sentence moses stared at burning bush?

The prepositional phrase in the sentence "Moses stared at the burning bush" is "at the burning bush".

Here's why:

* Prepositional phrases start with a preposition (in this case, "at") and include a noun or pronoun (in this case, "the burning bush") that serves as the object of the preposition.

* Prepositional phrases act as adjectives or adverbs, modifying other words in the sentence. In this case, it modifies the verb "stared," telling us where Moses was staring.