Here's a problem to solve: Many different plant and animal species live in the Amazon rainforest. Which is the most likely result of large areas of deforestation in the Amazon rainforest?

Among the 4 following options, which is the correct answer?

- A: an increase in animal populations
 
- B: a decrease in oxygen production
 
- C: an increase in precipitation
 
- D: a decrease in pollutants
 