The world's human population is growing at an exponential rate.
Explanation:
Humans have increased the world's carrying capacity through migration, agriculture, medical advances, and communication.
Many fish have an outer covering of scales. Scales protect fish, much like a suit of armor. All fish have a slimy covering of mucus. This substance allows the fish to swim through the water with very little drag and also makes it difficult for other organism to attach to the fish.
Explanation: