Natural Selection is defined as the evolutionary process in which the organism better adapted to the environment will have higher chances of survival and reproduction.
Natural selection can be caused by mutations, genetic diversity, and other behavior of the organisms.
Altruistic behavior is a type of behavior in which the other person or organism benefits from the cost of oneself.
For example, worker bees show altruism in which they perform selfless works like protecting the nest and forage for the food, which benefit the other bees but decrease their fitness.
The worker bees are undergoing continuous labor and are sterile. Thus, the bees work for others at the cost of themselves, showing altruism.
To know more about altruistic behavior, refer to the following link:
https://brainly.com/question/10108726