Which of the following answer choices contains a metaphor
a. his skin was sandpaper b. the sun sparked like a diamond c. she wanted to be like the birds and fly away d. they felt free when they ran through the doors

A metaphor often uses the word "like" to compare two things that actually have nothing in common, to create an image. The answer would be B. 

That is true  i hope that : )

For your first question.. space is such an important concept of art because you need to balance your open and closed space in art so it looks even. if you leave one side of a paper empty and draw a lot of detail and such on the other half does it really look no