Management is complex and critical and hence it is not right to confine its ………… to some management processes

often a noun phrase is just a noun or a pronoun:

people like to have money.

i am tired.

it is getting late.

he can eat everything and drink whatever he wants

explanation:

anxious,the clues in the question suggest he was embarrassed and anxious about boo radley.

sentence lenght varies according to word choice.you select which word to use and that will require to use other expressions that collocate with the word chosen.sentence length will vary   according to the choice of words you make to express your ideas.