Why do u think humanity got the ability to think?

When Homoerectus began to soften his meat with fire the jaw and jaw muscles shrank giving more room for the cranium to grow, thus the brain. The mastery of fire. This caused a greater utilization of proteins. The brain uses alot of protein. Those are the basics.

Because God created thinking beings with whom He could communicate thoughts. Throughout the Bible He has implored: "Come let us reason together".

Well, we don't have claws, teeth, or venom. We're slow, relatively hairless, with weak sensory organs. How else would we survive?

Depens on what you mean by think...

I don't think it was intentional