What was one reason given for dropping the atomic bombs on japan?

When conducting research for forming a hypothesis, which practice should historians follow?

What did the u.s. want to build on the land acquired through the gadsden purchase?

Which stanza structure does emily dickinson use in this excerpt from "hope is the thing with feathers"? hope is the thing with feathers that perches in the soul, and sings the tune without the words, and never stops at all, and sweetest in the gale is heard, and sore must be the storm that could abash the little bird that kept so many warm.