Human mating may lead to 
population decline improved eyesight earthquakes It helps them survive heat produced aggressive behavior produce offspring biological diversity
A B C D E F G H
Human mating behavior also involves some competition.
Human mating may lead to aggressive behaviors or displays of aggresion
Human mating may lead to  (A) population decline (B) improved eyesight (C) earthquakes (D) It helps them survive (E) heat produced (F) aggressive behavior (G) produce offspring (H) biological diversity