B. Biosphere (not too sure)
Answer:
They are important divisions of the U.S. government, which affects everyone who lives in the country. Being able to understand the House of Representatives and the Senate allow us to understand how laws are created, our rights, how the government functions, etc.
Explanation:
The author who proposed the theory of "natural selection," which other people called "survival of the fittest" was named Charles Darwin. These two ideas are the founding basis of the theory of evolution.