Comparative psychology can be described as the scientific study of the behavior and mental processes, particularly relating to the development of behavior (which is drived by rewards and learning), adaptive significance, and phylogenetic history of organisms.
Comparative behaviorist are the researchers that are devoted for such work.
Thus, the given statement, "The major driving forces of behavior are learning and rewards" is made by a comparative behaviorist.
Explanation: Meosis is the result of an egg and sperm coming together to form a zygote, before the zygote becomes an actual zygote, it goes through cell divison to create the daughter cell w