When a deer's in trouble what adaptation does it use?

Answer 1

If a deer senses danger, they often run away from it. However deer, especially males will often defend their territory or harem using their horns or front legs - ever seen the funny revenge video of the deer attacking the hunter? That is a good example of the deer using its legs only to defend itself and ward off the human.

Remember deer have acute hearing, they are very cautious, weary animals and live in groups for protection, these are herbivours after all, that's why they have eyes on the side of their skull - designed to be on the lookout for danger constantly.

Ofcourse deer are also nimble, quick and agile animals, all these are adaptations and structures to help the animal when it must escape or face danger.