Wolves, foxes, coyotes, and many other beasts as well as birds are natural enemies of rabbits. Rabbits increase so fast that, despite their having so many enemies, they are sometimes very destructive to crops. Henry Ford worked to build cars cheaply so that even the workers who made them could afford them. He also paid the highest wages in the automobile industry. Some animals eat only one particular plant or other animal.
Most animals depend on a relatively limited number of foods.
The human species, on the other hand, can and does live on a wide variety of foods. One people's diet in one part of the world is very different from that of another people's in another part of the world. Another evidence of human ability to adapt to many kinds of environment is seen in variations in housing. The story is told of six blindfolded persons who examined an elephant. A third touched the trunk and thought the elephant was like a snake.