What is bioaccumulation and biomagnification?

Bioaccumulation takes place in a single organism over the span of its life, resulting in a higher concentration in older individuals.

Biomagnification takes place as chemicals transfer from lower trop.hic levels to higher trophic levels within a food web, resulting in a higher concentration in ape.x pre.dators.

d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."