Defence against predators
The second kind of defence is very obvious. It is to carry armour and/or offensive weapons like horns. These are permanent visible defences. For larger prey animals this can be effective if linked to another defence. Thus, in natural habitats, elephants have tusks, and they also have huge size. Antelope have horns, and can also run fast. Almost all large herbivores live in herds, which undoubtedly is safer than living alone.