Final answer:
Insects are the class of organisms that outnumber all other animals on Earth.
Step-by-step explanation:
Insects are the class of organisms that outnumber all other animals on Earth. They are the most diverse group of animals, with over a million described species.
Adult insects range in size from tiny fairy flies to 21.9-inch-long stick insects.
Arthropods such as insects make up the majority of the animal kingdom and are found in nearly all environments on the planet.