What question did charles darwin try to answer?

Why do different organisms live in different places Why do different regions have different organisms

It was during this voyage that he began to consider the issue with which his name is most often associated, namely the origin and evolution of species, including humans. He proposed that species evolved gradually by a combination of random mutation and natural selection over a long period of geological history. Thus the main questions he asked and answered concerned how species evolved and obtained their current forms.

It guarantees them.

Explanation:

The Bill of Rights is an amendment of the United States Constitution that protects the rights of people and limits the power the government has. So, according to this, the answer is that the statement that best describes what the Bill of Rights does for citizens' rights is that it guarantees them.