Cola-nut gall

Okay, so you know how sometimes trees can have bumps or weird shapes on their branches or leaves? Well, sometimes the cola tree, which grows in Africa, can have a special kind of bump called a cola-nut gall.

This happens when a tiny insect called a gall wasp lays eggs on the tree. When the eggs hatch, the baby wasps start to eat the tree's leaves and the tree gets really upset. It tries to protect itself by growing a special kind of bumpy wall around where the baby wasps are eating. This bump is called a gall.

Now, here's where it gets interesting. The cola-nut gall isn't just interesting to look at, it's also really important to some people! You see, the cola-nut gall contains a chemical that can be used in medicine to help people feel better. It's also used to make a special kind of soda called Coca-Cola.

So, to sum it up, a cola-nut gall is a bump that grows on the cola tree when tiny bugs eat its leaves. It contains a chemical that is useful in medicine and is used in the production of Coca-Cola.