Why do most animals have one or two very important senses?

Animals have one or two important senses to help them in survival. The natural world isn't always as pleasant a place as you might see in cartoons. It can be cutthroat, painful, and at times it is difficult for animals to survive. Human activity has made this all the harder, as territories and ecosystems of plants and animals get destroyed, and natural patterns disrupted.

For animals to live long enough to have young and continue their species, they often need clever strategies. Those strategies are called survival skills. Survival skills are the techniques animals use to stay alive and safe. They include everything from protecting territories, using camouflage, teamwork, sharing resources, fleeing from danger, and methods of scaring and intimidating enemies.