Who's the Smartest on the Tree?

A riddle posted on TikTok has captured the imagination of users attempting to figure out who among the four sitting on the tree is the smartest.

In the picture, three out of the four are equipped with saws and are trying to cut one another off the tree. You need to decide which boy is the smartest. Can you figure it out?

If you're stuck, here's the answer: Boy number 4 is sawing the branch he's sitting on. Boy number 1 sits on a branch that both numbers 3 and 2 are sawing. Boy number 2 is on a branch being sawed by number 3. Only number 3 is cutting a different branch and thus cannot fall from the tree. Therefore, number 3 is the smartest among them.