This is called a chemical bond.
Some ways to reduce stress is Walking your dog it’s great to reduce pressure and stress,Another way is Going for a bike ride and getting fresh air, watching a movie or a tv show is great to get your mind of everything that is making you stressed. meditation include better focus and concentration, improved self-awareness and self-esteem, lower levels of stress and anxiety, and fostering kindness. Meditation also has benefits for your physical health, as it can improve your tolerance for pain and help fight substance addiction
Because less animals means less energy that can be used.
Camouflage: helps it hide from predators trying to eat. Speed: helps it run away from predators