It's an informative piece, one to tell the reader about facts and not your opinions <span />
Since bees help pollinate plants, a lack of pollination could prevent certain species of vegetation from growing. Therefore, the plants could be driven into extinction. These plants act as a food source to many animals, so if the animals have nothing to eat, they'd die off as well. Consequently, our own food supply of crop and animal would decrease.
Answer: (B) nervous of the slight change he can sense.
Explanation: