Final answer:
Kin selection is a form of natural selection where individuals that sacrifice their own lives for the benefit of their relatives are considered the most fit.
Step-by-step explanation:
Kin selection is a form of natural selection where individuals that sacrifice their own lives for the benefit of their relatives are considered the most fit.
For example, in a population of ground squirrels, a squirrel may give an alarm call to warn others of an approaching predator. Although this squirrel may draw attention to itself and increase its own risk of being caught, it is increasing the chances of survival for its close relatives who share its genes.
This behavior is considered kin selection and those individuals who exhibit it are considered the most fit.
Kin selection is advantageous for genes that are passed on to future generations through close relatives, even if the individual dies in the process.