When it comes to personality, the phrase "opposites attract" seems to be the exception, rather than the rule. People typically match up pretty closely when it comes to choices of romantic partners

Which evolutionary principle has been used to explain this phenomenon?
a. Natural selection
b. Assortative mating
c. Adaptation
d. Survival of the fittest

Answer: B

Rationale: This is choosing sexual partners who are similar to the individual doing the searching.