Question

why is it the sweetest in the gale​

Answer 1

Answer:

This new stanza picks up where the last one left off. The fancy poetic term for that is enjambment. And the idea that it continues is this: the hope-bird is always singing, and it sounds "sweetest" when there's bad weather going on. (A "gale" is a strong wind.)

Answer 2

Answer:

By "Sweetest in the gale is heard", Emily Dickinson refers to how a bird's voice is sweetest and most beautiful when heard in a gale or a chaotic scene.She uses this bird as a metaphor for hope, which is most helpful when we are in trouble.

hope it helped!