The fog comes on little cat feet. it sits looking over harbor and city on silent haunches and then moves on. what is the main similarity between “fog” and frost’s poem "mending wall"?

Both authors lived in the same period and each one of them is considered important in contemporary literature. Regarding the poems, the correct answer is that both poems use everyday language. The poems have got conversational language, without any poetic extravaganza. Indeed, the poems have got a direct message and easy tone.

you do this because a real teammate puts the team first

it is an infinitive phrase with a subject.