The correct answer is: B. Bat
Chiropterophily is the pollination of flowering plants by bats. It is a type of zoophily, which is pollination by animals. Bats are attracted to flowers by their color, shape, and scent. They use their tongues to lick nectar from flowers, and in the process, they transfer pollen from one flower to another.
Bees are also pollinators, but they are not bats. Bees are attracted to flowers by their color, shape, and scent, but they use their mouthparts to collect nectar and pollen. They do not lick nectar from flowers, so they do not transfer pollen in the same way that bats do.
Insects are also pollinators, but they are not bats or bees. Insects are attracted to flowers by their color, shape, and scent, but they use their mouthparts to collect nectar and pollen in different ways than bats and bees do.
Birds are not pollinators. They are attracted to flowers by their color, shape, and scent, but they do not collect nectar or pollen. They do not transfer pollen in any way.