Few of us appreciate the determination of the pioneers who traveled west of us
of the pioneer

is this an adjective phrase or adverb phrase

of us- adverb phrase

of the pioneer- adjective phrase

Explanation:

An adjective phrase working as a prepositional phrase provides more information about the noun or pronoun in the sentence. In the phrase, 'of the pioneers who traveled West,' the prepositions qualify the noun, 'pioneers'.  A description of what the pioneers did is also provided- they traveled.

The phrase, 'few of us', is an adverb phrase as we are given the information- how much of something. Adverbs provide answers to why, when, where, and how much of a particular thing.

the answer should be a)directions.