ELI5: Explain Like I'm 5

Perennial stream

A perennial stream is like a river that never runs out of water. It has water all year round, no matter if it's raining or not. It's like having a never-ending supply of water running through a place. You can always count on this stream to have water. This is because the stream is fed by groundwater, which keeps supplying water even during dry seasons. Because the stream has water all the time, it can support plants and animals even during harsh weather conditions. Perennial streams are important because they provide a reliable source of water for people, animals, and plants.