Animals have developed several ways to escape from predators.
Running is one way, most animals will run from danger.
Fighting is another. Teeth and claws often deter small predators from getting a meal.
Camouflage is used to hide from those animals that would do others harm, fawns are spotted when born for just that purpose. Still others have developed natural defenses such as toads who urinate bad tasting liquid and skunks who smell really bad.
Animals find shelter in the ecosystem. The animals are predators. They use the resources they have.
Wolves are predators
Different animals have different survival instincts that help them to survive in the wild. Some animals have the ability to camouflage themselves and hide from predators.
They hunt/forage for food and try to escape from predators to survive.
so they can blend into their environment and stay hidden from predators
The majority of predators are scared off by the rattle - it's not a 'natural' sound and most animals will flee from something they're unfamiliar with. Add to that - a highly-potent venomous bite - and the rattlesnake will survive most predators.
Animals need thick coats to survive in the cold temperatures and often have a protective coloring to hide from predators.
Camouflage is often used to hide from predators as well as prey.
Mimicry can help animals survive by allowing the animal to avoid being eaten. It can act like a predator and scare away its own predators. There are many such examples of animals acting like something else to survive.
The animals with the abilities that will help them to survive better than those without the same abilities will likely survive longer and will not be killed by predators. Those animals will live on and give their children the same abilities to survive, helping the species to adapt to a hostile environment.
Yes - many predators (that would not normally feed on carrion) will turn to eating dead animals in times of food scarcity.
No, fear is the emotion you feel when you think (or know) something bad is going to happen. Predators are animals that eat other animals to survive. You're a predator (unless you don't eat meat).