Elevation in ballistics is all about how high or low a bullet travels when it's shot from a gun.
Think about a cannon (like the ones pirates used on their ships). When the cannon is pointing straight ahead, the cannonball goes straight. But, if the cannon is pointing up like it's shooting into the air, the cannonball goes up high and comes down far away.
Now, a bullet is kind of like a mini cannonball. When someone shoots a gun, they need to make sure that the gun is pointed in just the right way so that the bullet goes exactly where they want it to go. This includes how high or low the bullet will fly.
To figure out how high or low the bullet will fly, there are a few things to consider. One of them is how strong the gunpowder is. If there's more gunpowder, the bullet will fly higher. Another thing to consider is the distance between the shooter and the target. If the target is farther away, the shooter might need to aim the gun higher.
Lastly, there is something called the "bullet drop". This means that the bullet will start to fall down towards the ground as soon as it is shot out of the gun because of gravity. So, the shooter needs to adjust the gun to make the bullet go up higher in the beginning, so that it will still hit the target even when it starts to fall down.
All of these factors are taken into account when figuring out the elevation in ballistics, which ultimately helps the shooter hit their target!