Steer are not aggressive animals. Steer are male cattle who used to be bulls, but were castrated at some point in their life, most likely early on while it was young. This is to prevent the animal to breed with any cows or heffers in the field, and to also make them unaggressive.
aggressive animals
That is taking a bull and removing certain parts to change it to a "steer". The steer can thence no longer reproduce, and is also a lot less aggressive.
Any and all breeds of cattle are used as show animals, steer or not.
Why animals are aggressive towards each other is usually for dominance and like that is their territory not your territory.
Not necessarily. They will still be aggressive to other animals because of their territory and they may not stop being aggressive.
yes
yes they are wild animals
Shelters kill animals if they are sick or aggressive. Sadly, they do kill animals if they get too full.
Stress can cause a cat to be grumpy and aggressive towards people
yes yes
cat cougar chimpanzee
There is none as humans are animals. (For this reason, this isn't a useful question)