This was written poorly, but I assume you are talking about Commensalism:
"An association between two organisms in which one benefits and the other derives neither benefit nor harm."
Advantaged: ants
Neutral party: aphids
<span>The answer is helminths. There
are two types of helminths: roundworms (nemat-helminths) and flatworms (platy-helminths).
One of the major groups is the cestodes that are comprised of the tapeworms and
hookworms and the flukes (trematodes). Their life cycle usually involves eggs,
larvae, and adults with the eggs being the infectious agent</span>
For the hardy weinberg eqn ;
it is D ! so option second is correct !
and for the second one, it is mutation !
if you need explanation, comment ! or it is OK !
Depending on how good that species is at adapting to new environments that species of animals could adapt overtime, or die