Why are enzymes important?
a.
enzymes are complete proteins essential for good health.
b.
enzymes break down proteins for use in the body.
c.
enzymes carry oxygen to other organs in the body.
d.
enzymes make up muscle tissue in the body.

its 42

i say its d?

the correct option is option d

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).

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: