Over time weeds have become resistant to pesticides. which process explains how pesticide resistance developed? a. natural selection b. biological inheritance c. commensalism d. species becomes extinct

A. Natural Selection.  This is because the weeds that are not resistant to it die out before they can reproduce, but the resistant ones grow to maturity and then reproduce, passing down the resistance gene.  Over time, the resistance gene would become a normal thing in weeds, while the non-resistant gene would not exist anyone, since the gene could not be passed on.

The phenotype of the offspring will be 100%tall