Answer:
I could be wrong but I believe it is,
"rocks," and "dark matter"
Answer:
By changing a gene's instructions for making a protein, a mutation can cause the protein to malfunction or to be missing entirely. When a mutation alters a protein that plays a critical role in the body, it can disrupt normal development or cause a medical condition.
B. The U.S stock market crash and Franklin D Roosevelt’s policies
C. The sun, this gives energy and to animals and food for plants
