QUESTION 6 Buffleheads who defend territories might have two strategies: aggressive or defensive. Aggressive buffleheads intrude on other territories and incur higher costs, but also greater benefits, than defensive buffleheads. What is the evolutionary stable strategy (ESS) for the payoff matrix below? Aggressive Opponent Defensive Opponent Aggressive Challenger 25 10 Defensive Challenger 5 5 a. Pure defensive b. Pure aggressive c. Mixed aggressive and defensive d. The ESS cannot be det.