Concept:A boxer protects the face by using a defensive “high guard” stance.Explanation:During a boxing match, after an opponent attacks, a fighter raises both arms.The fighter holds the closed hands, called fists, in front of the face.This guard helps to block or reduce the impact of incoming punches.The other options are not correct because “palms”, “elbow”, and “hands” do not specifically describe the closed fists used for blocking in boxing.Answer:D. fists