Final answer:
Altruism, along with mutual benefit behaviors that are beneficial to recipients, is collectively known as inclusive fitness. This concept encompasses both the direct reproduction of the individual and the reproductive success secured through related individuals, thereby aiding the perpetuation of shared genes.
Step-by-step explanation:
All cases of altruism (along with some cases of mutual benefit) in which we find behaviors that are selected for because they are beneficial to the recipient are collectively known as inclusive fitness. Inclusive fitness explains the tendency of an individual organism to help others closely related to it, which then helps to pass on shared genes to future generations. It includes not just personal reproductive success (direct fitness), but also the reproductive success of relatives (indirect fitness).
Many examples of altruistic behavior can be seen in the animal kingdom. For instance, bees, meerkats, wolves, wild dogs, and lemurs show behaviors that, at first glance, decrease their own fitness while increasing another's fitness. However, such behaviors may ultimately serve the individual by helping to propagate shared genes in the population, supporting the concept of 'inclusive fitness.'