Answer:
By his/her actions, the altruist increases the likelihood that some of its genes will be passed on to the next generation.
Step-by-step explanation:
Altruistic behavior will most likely make an individual able to form deep personal relationships with other people.
When we see this natural selection perspective, Altruistic behavior will increase the number of allies that people have. The increase in allies will also increase the chance of survival for those people since there will be more people that willing to help them when they face a threat.
This mean that the altruist increases the likelihood that some of its genes will be passed on to the next generation.