Pretty sure its C. Because if you look it up it says that it <span>illustrate the complex relationships among economic, social, and environmental issues </span>
What are you asking by this?
Answer:
If jobs are scarce in your locality, with layoffs occurring and home ownership put in jeopardy, values fall. Like a domino effect, fewer people can afford to buy a house. Owners lower their prices to compete in a diminished market.
The answer is C. Rubber. Iquitos profited greatly from the boom of the rubber industry, beginning in the 1900s.