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a student must write a three-page essay for a science class. which of the following topics is narrow enough?

a. the life cycle of a butterfly

b. the geology of north america

c. african mammals

d. chemical reactions

A. The life cycle of a butterfly

this would be in the imperative mood. it is a category of verb forms that are used to express orders,instructions,commands or requests.

the answer should be d) he was one of those young thousands who greeted the war with a certain amount of relief, welcoming the liberation from webs of tangled emotion" since it is the best option because it shows his desire to free himself.

hope this answer you! have a great day.