Answer:
Ancestor- Someone that you have descended from. Typically someone you are distantly related to.
Trait- A quality or characteristic specific to a person.
Population- The number of people in an area.
Natural selection- The process where organisms adapt to their environment (this theory was first studied by Charles Darwin).
Artificial Selection- a process used in breeding animals or cultivating plants.
Variation- A change or difference in something.
Environmental pressure- Things that cause the environment to change.
Heredity- Physical or mental characteristics passed on to offspring.