Answer:
Animals are intelligent because they know how to interact or may even be as smart as a human. For example, an elephants neurons measures to the human brain amount, but they are still not the smartest, that means there are animals more intelligent than humans. Some can have half a million neurons even though this does not scale to the amount of a human brain contains 100 billion neurons it will still give the animals some intelligent abilities. Some are even as smart as humans because of their brain size counting their neurons to the same as a human brain. My opinion is neutral on this topic, I believe the bigger amount of them are intelligent, the rest remain unintelligent.
Animals are intelligent because they know how to interact with objects and humans and even know how to use sign language. For example, that animals know how to interact is that Koko the gorilla took Robin Williams wallet, he then opened it and took out his identification and checked it hilariously, put it back into his wallet and closed it up. Additionally, he grabbed his sun-glasses and unfolded them and put them on. Now keep in mind, he could have never seen or touched and a wallet or glasses, so if he has never seen them before, then he must have enough intelligence to know how to interact with these certain objects. Also, Koko used sign language to say “Chase me”, and “Tickle me”. Now this is not very common among animals, some humans have enough problems with learning sign language, but if a gorilla were to learn it, think of how hard it would be for him to learn that as an animal.
Moreover, animals are intelligent, is that dogs have half a million neurons which you might not think that is a lot considering a human can have up to 100 billion neurons or more, but it can give them the ability to learn complex tasks, especially those that benefit humans. Dogs guide the blind and herd livestock. They sniff out explosives and help find survivors buried beneath earthquake rubble. They also have strong memories and an impressive capacity to understand human language. They have the ability to do so because their brain contains half a million neurons. Some animals have very low neurons in their brain a lot of studies would probably be saying that this means that animals are not smart, but this does not mean that they are not intelligence. The cat has about 200,000 neurons, and you might think that they are not smart, but cats can hunt, which isn’t so great for the wildlife, but anyways, cats can clean themselves, relieve themselves in tiny kitty litter boxes, and sometimes if they are a more intelligent cat than others, they can even use human toilets, but cats are also better at food portion control then other animals and pets.