Final answer:
Leah Price breaks her arm in 'The Poisonwood Bible' while spying on Congolese revolutionaries from a tree.
Step-by-step explanation:
In The Poisonwood Bible, the Price girl who breaks her arm while climbing a tree to spy on the 'African Communist Boy Scouts' (the Jeune Mou Pro, or Congolese revolutionaries) is Leah Price.
Leah's adventurous and inquisitive nature often leads her into situations that challenge her perceptions, including the one in which she is injured while trying to learn more about the political situation in the Congo.
This event reflects the complex interplay of family dynamics, personal growth, and the historical-political landscape that the Price family finds themselves in within the novel.