Okay, little buddy! Imagine a big, powerful water hose that firefighters use to help put out fires. This hose can spray a lot of water very fast!
Now, to help control how much water comes out and where it goes, firefighters have a special tool called a hose lance. It’s like a magic wand for water.
When the firefighters turn the hose lance, it's like turning the faucet at home. Turning it one way makes the water spray out really hard, which is great for putting out big fires. If they turn it the other way, the water sprays out softer, which is better for smaller fires or when they need to be careful.
So, when you see firefighters spraying water on a fire, they are using the hose lance to control how much water they are using, making sure they do their job safely and effectively!