What need motivates Cassie’s behavior toward Lillian Jean in Chapter 8 of Roll of Thunder, Hear My Cry? a need for friendship
a need for respect
a need for safety
a need for advice

The only reason based on my own answer or some of my instinct jack flack up and down and then twist all around before taking his medicine is because the label of his medicine says that you need to shake well before using or before taking it.