Which of the following geographical features most affects the dry climate of Chile?

A. Mountains

B. rain forest

C. Grasslands

D. Atlantic Ocean

The question is asking us "Which of the following geographical features most affects the dry climate of Chile?" and the answer is the mountains. We can immediately reject the options of "Atlantic Ocean" and "rain forest" as they are not present in Chine - Chile is bordering the pacific ocean. It is a very mountaneous country, so "mountains" are the best answer.