Which of the following is not needed in a population in order for natural selection to act?

a.) superior strength or size

b.) genetic variation

c.)b overproduction

d.) a struggle for existence

blah

explanation:

bc blah

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.