Question

which behavior is both territorial and used for courtship? (1 point) baring teeth as a sign of aggression dance rituals with potential partners sparring or wrestling using antlers or horns defending a nest from predators

Explanation:

Baring teeth is mainly aggression - not courtship. Dance rituals are courtship but not territorial. Defending a nest from predators is territorial but not courtship. Sparring or wrestling using antlers or horns can be to defend territory and also show strength in courtship displays.

Answer:

sparring or wrestling using antlers or horns