Question

how can animals help humans?

Answer 1

Animals help humans in many ways:
Animals help pollinate plants.
Animals help fertilize plants.
Animals are part of the food chain and keep ecosystems in balance
Animals serve as companion animals, helping reduce depression, loneliness.
Animals serve as therapeutic animals in hospitals, nursing homes, etc...
Animals work as service animals, such as seeing eye dogs, cancer sniffing dogs, epilepsy, seizure sensing dogs.
Some animals are working animals - herding dogs, sled dogs, horses, mules, cows (Pulling carts), explosive, bomb or drug sniffing dogs, scent tracking dogs, seals and dolphins trained by the Navy for security, Search and Rescue dogs, elephants (transportation and moving objects), etc...
Animals produce and serve as food for humans.
Animals provide us with materials - fur, hides, leather, ivory, sinew, bone, which we can make into housing (teepee, yurts), clothing, tools, etc...
Animals can be beneficial in controlling harmful animals and plants - weed eating goats herds, ladybugs eating aphids, etc... Snakes keep down rodent and insect populations that can carry diseases harmful to humans.
Animals can transport messages - as in messenger pigeons.
Animals can protect humans - guard dogs, llamas guarding the herd.
Animals have warned humans of danger - fire, tsunami, etc...
Canaries were used to warn miners of deadly gas
Animals are used in medical research and testing. Some very helpful medical discoveries have resulted from some of this research.
Animals help create medicine - Horses help create snake anti-venom.
Animals serve as indicator species, telling humans the health of an environment or ecosystem. Frogs are often the first animal effected in a unbalanced/unhealthy ecosystem.
Animals inspire humans. Studying animal form and function can aid scientist, behavioralists, engineerings, inventors. Examples: in creating flying machines, or making something more aerodynamic.
Animals can produce fuel for humans - methane from pigs.
Animals can help humans hunt - hunting dogs, falcons.
Seeing and learning about all the amazing in animals in the world help teach humans to protect world's environment.
Animals can make us happy.
In the end we humans are members of the animal kingdom. We are animals.