Which of the following statements CORRECTLY defines what b represents in the Hamilton's rule?

Question

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Hamilton's rule states that an altruistic act is favored by natural selection if the cost to the actor is less than the benefit to the recipient multiplied by their genetic relatedness. Here, "b" represents the benefit to the recipient (or the increase in fitness of the helped individual) resulting from the altruistic act.

Which of the Following Statements CORRECTLY Defines What B Represents