Fall line

Have you ever taken a ball and rolled it down a hill? When you do that, the ball follows a line that goes straight down the hill, right? That line that the ball follows is called the "fall line."

Now, imagine that the ball is actually a river full of water instead. Just like the ball, the water in the river also flows down the hill and follows the fall line. This fall line is where the river drops in elevation the most.

The fall line is important for a few different reasons. It can create waterfalls or rapids in the river, which can be fun to play in or watch. It also makes it easier to transport goods and people if there are towns or cities built near the river, because boats can follow the fall line to get to their destination faster.

So remember, the fall line is the path that water (or a ball) follows down a hill, and it's important for things like transportation and water activities.