ELI5: Explain Like I'm 5

Scenario

Okay, let's imagine you're playing a game where you have to pretend like you're in a certain situation. This is called a scenario.

For example, let's say you and your friends are playing "house". Someone is the mom, someone is the dad, someone is the baby, and someone is the dog. This is a scenario because you're pretending like you're in a different situation than you actually are.

Now, imagine that instead of playing "house", you're playing a game where you have to pretend like you're on a spaceship. You have to imagine what it's like to be floating in zero gravity, wearing a space suit, and talking to your friends through a space helmet. This is another scenario because you're pretending like you're in a different situation than you actually are.

Basically, a scenario is when you imagine yourself in a specific situation and play out what you would do in that situation. And it can be for fun, like playing games with friends, or it can be for training or planning purposes, like when firefighters practice responding to emergency situations.