How is bravery introduced in Chapter 1 of To Kill a Mockingbird?

EXAMPLES OF BRAVERY IN CHAPTER 1
OF TO KILL A
MOCKINGBIRD

• Jem's overcomes his
  broken elbow and goes on to play football. "He couldn't have cared less as long as he
  could punt and pass."


• Simon Finch establishes a homestead
  in the wilds of Alabama.


• The primary act of bravery comes
  when Jem accepts Dill's dare, after thinking about it for three days, to run up and
  touch the side of the Radley house. Dill would give Jem his copy of The Grey
  Ghost if Jem accepted the challenge. Jem still wasn't sure about taking the
  dare until Scout "sneered at him."

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     Jem threw open the gate and sped to the side
of the       house, slapped it with his palm and ran back to us, not waiting to see if
his foray was successful. Dill and I followed on his
heels.