Because they contain a source of high-quality protein that’s equivalent in value to animal protein, are an excellent addition to a meat-free diet.
a. chick peas
b. grains
c. soy products
d. sesame seeds

The correct answer is soy products.

Proteins are very essential for the body, as 20% of human body is made up of proteins. As human body does not stores protein it should be consumed on a daily basis. Animal protein is superior to plant protein as it contains all the amino acids necessary for the growth and development of the body. In case of meat free diets soy proteins can be the best source of protein as it also contains the essential amino acids. Soy products such as soy milk, soy sauce, soy beans, tofu are some of the soy products rich in protein.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!