Which piece of evidence would best support the argument for kin selection as a mechanism for the evolution of altruistic behavior?
a hippo stops a crocodile from eating an antelopea hippo stops a crocodile from eating an antelopean antelope gets separated from the herd and killed by predatorsan antelope gets separated from the herd and killed by predatorsa penguin protects its chick from seagullsa penguin protects its chick from seagullsa clown fish helps clean parasites off of a sea anemone