For some species,aiding in the rearing of siblings in a group rather than reproducing on one's own is the best way to ensure that an individual's genes are passed on to the next generation.

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This is true for species that live in groups or colonies, where cooperative breeding and helping behaviors increase the survival and success of the offspring, and thus the likelihood of the genes being passed on to future generations. Examples include certain birds, primates, social insects, and some fish.

For Some Species,aiding in the Rearing of Siblings in a Group