The correct option is B They are agents for pollination
The most recognized pollinators are the various species of bees, which are plainly adapted to pollination. Bees typically are fuzzy and carry an electrostatic charge. Both features help pollen grains adhere to their bodies but they also have specialized pollen carrying structures; in most bees takes the form of a structure known as scopa, which is on the hind legs of most bees, and or the lower abdomen made up of thick plumose setae. Honey bees, bumblebees and their relatives do not have a scopa, but the hind leg is modified into a struture called the corbicula. Most bees gather nectar, a concentrated energy source and pollen, which is high protein food, to nurture their young and inadvertently transfer some among the flowers as they are working.