Which words make up the prepositional phrase in this sentence?

The tulips in the park are especially beautiful this year.

A. are especially beautiful

b. in the park

c. this year

d. The tulips

Prepositions are the ones that gives information to the reader, like information about the place or about the description. Examples of prepositions are: behind, below, about, from, to, with, etc. So, The right answer is b. in the park (it gives information about the place).