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.
There is a radical error, I think, in the usual mode of constructing a story.
The answer to your first question is B- she flirts with her own husband at dinner
The answer to your second question is A- Algernon ate them all
Perhaps he meant that they both understood what the other character or thing was saying, without saying a word
