Why Do Some Volcanoes Erupt In Chains?

Imagine you're playing with building blocks and you push them all together, they make a line. Sometimes, volcanoes work like that! When big parts of the Earth move slowly underground, it pushes up a chain of volcanoes, kind of like how a row of candies might be pushed up in a box. This happens because the Earth's crust is moving and breaking into pieces, making new mountains and volcanoes pop out one after another.