Observing. The biologist is not interfering nor testing a hypothesis.
I believe its A because all the other one dont make scene really.
Explanation:
There are three main types of rocks: sedimentary, igneous, and metamorphic. Each of these rocks are formed by physical changes—such as melting, cooling, eroding, compacting, or deforming—that are part of the rock cycle.
At about 3 years of age children first become capable of self-regulation. It <span>is an </span>important skill for children to develop.Self regulation means that children are capable to r<span>egulate their own feelings and behaviors.</span>
It was formed from the remains of ancient plants and animals.