In the wattled jacana (Jacana jacana) , a species of tropical wading bird, all brood care is performed by males. Females protect nests and defend territory. Females sometimes attack and kill chicks cared for by a male. The male then fertilizes the female attacker and cares for the resulting young. This type of social interaction is an example of
A) cooperation.
B) selfishness.
C) spitefulness.
D) altruism.
Correct Answer:
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