The correct answer to this open question is the following.
The scientific reason biosphere reserve is a boon for plants and animals because this reserve is under the supervision of specialists, scientists, and environmentalists. This protected area includes a diversity of animals, plants, and nature that requires conservation on the part of humans to maintain the proper conditions of the reserve. These living things and organisms interrelate with all the environment and scientists try to restore and supervise the growing and developing of the species in the reserve for the good of all mankind.