I read this book last year so take this with a grain of salt.
Gene jumps from the tree to compete with Finny due to the fact that Gene is always trying to do better than Finny. He is put under the grasp of peer pressure due to Finny almost forcing him to do this. Ever since he first jumped Finny kept pressuring him to jump since he thought Gene enjoyed jumping.
Rather than uses this answer you should probably just reread chapters 3-4
Answer:
1. Our teacher said we must bring socks, shoes, t-shirts, and shorts.
2. I wanted to take biscuits, sweets, fruits, and chips for the
journey.
Explanation:
Comma (,) is used to separate the items in a list. In the above sentences several items are listed. These items ought to be separated to be more understandable to the reader. In the first sentence, items such as socks, shoes, t-shirts, and shorts are listed. To be more understandable to the reader a comma is inserted after each item is mentioned.
Full stops or Periods are used to signify the end of a sentence. They were also missing in the above sentences.