What question would a biologist most likely investigate? 1. Which reactions produce decaffeinated coffee? 2.Do drier growing conditions affect the size of coffee beans? 3.Why do some people like tea better than coffee? 4.What is the best temperature for roasting coffee beans?

It would be...

Do drier growing conditions affect the size of coffee beans?

Explanation:

This is because a biologists would not ask why do some people like tea better than coffee. It has nothing to do with biology. Same for question 4. Only someone who is a coffee fan would ask that. A biologists would ask number two because biologists deal with nature. So growing plants and the environment. Biologists study how plants grow so growing conditions would be a part of biology.

we would need to see the picture to answer it