Answer and Explanation:
The gene pool is the sum of all the alleles in a population. Sometimes, allele frequencies within a population change randomly with no advantage to the population over existing allele frequencies. This phenomenon is called genetic drift.
By the unequal heating of earths surface
The answer is most simply A
Answer: Flowers need sunlight
Explanation:
Flowers are attracted to the light because its wants makes them grow its kinda like humans eating food well as a flower they need water air and sunlight as there food.