Correct choice is (a) Ovulation
Explanation: Pyrethroids usually affects ovulation in females, they harm the ovules and the follicular cells by decreasing their number. They also affect oocytes and various female endometrial glands. But the molecule doesn’t interfere with the activity of the ionic permeability of nerve cell membranes, or circulatory system or digestive system. These are certainly not affected by the pyrethroids or any micro pollutants.