You are right, it is B because, endocrine glands, as part of the endocrine system, they regulate and maintain a constant equilibrium in our bodies, known as homeostasis.
For real lo people just be putting anything
A buildup of pesticides could get into an animal. That animal will be killed by a hunter. The hunter eats the animal with the pesticide. The hunter then becomes sick. This is just an example but you can see what i'm getting at.
Cause now afays climate changes very fast and more technologies hot advanced