The main focus of charles darwin's studies was on the gradual process of adaptation within populations. in other words, microevolution occurs by means of natural selection. although critical to evolution this form of change,

Cannot account by itself for the increase in species diversity over time

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation: