Answer
During winter season, the growth and survival of moths are compromised.Also Parasites kill all the moths so no future generation will be left. This would also show negative effect on the parasites population. Hence evolution made sure that parasites are less effective during winter season
Work Step by Step
During winter season, the growth and survival of moths are compromised.Also Parasites kill all the moths so no future generation will be left. This would also show negative effect on the parasites population. Hence evolution made sure that parasites are less effective during winter season