[jewpinthethird]

It does rely on the intellegence of a species. Many of the more intellegent species of animals have learned how to use tools. Mostly mammals. Otters use rocks to bash open the shells of their prey, apes have also learned how to use tools. Even birds use tools to an extent...they eat gravel to help in the digestion process of seeds. But is solely instinct?

Why is it that humans have to get jobs? To earn money. Why do we humans need money? To ensure that the things we need to survive in life are paid for. Humans just use a more advanced versions of what other animals use.

Do animals have theory of thought? Well, humans do, and they are in the Kingdom Animalia. Some apes do to (to an extent).

The Evolution process of the human mind has just made mankind think it's more important in the grand scheme of things. But just because we cant quite comprehend what other animals may think, doesnt mean they dont.