Generally one or two pages, but it could be three, though it isn't often.
the answer to your question is theme
Answer:
Many writers use imagery to convey a picture without saying directly what the image is. ... Imagery is an important element in writing. Imagery can stimulate the imagination and create vivid pictures in the mind.(If you look many best-sellers play heavily on imagery)
Answer:
The brain/human mind is c) wide, deep and weighty
Explanation:
Dickinson explores how complex and special the mind is as she compares it to the sky's limit and the depths of the ocean (various posibilities of physical dimension) , and the weight of God (spiritual dimension).