The correct answer is C.Acute stressors
I would say the food availability for gray squirrels will be affected because we do not know their diet. It also say that the red squirrels and the black squirrels have the same diets meaning less food on the Island for the grey squirrel( depending on what he eats. )
A- Flatworms are unsegmented and only have one mouth/anus opening. And they are obviously flat