I think it’s F, c, and a.
It is d because pesticides run off into water, they are absorbed into soil , and they are left in the air , hope this helps :)
The general definition of a gene is some heredity that is passed on from a parent to an offspring. Scientifically speaking, the transfer involves a sequence of nucleotides that forms part of the chromosome. This sequence of nucleotides is a DNA.
Thus, the answer would be
A. a segment of DNA
