The authors perspective is like the author wanted to be in the book
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.
1st appositive is "Mrs. Gordon"
2nd appositive is "Mrs. Teasdale"
