What are evolutionary pressures?

Evolutionary pressures are things that push and pull living creatures to change over time.

Imagine you're playing a game where you have to run as fast as you can to catch your favorite snack before it disappears. If the snack is really far away, or if there are other kids also trying to catch it, you might start running faster, jumping higher, or even taking shortcuts, all so you can win the game.

Evolutionary pressures are like the rules of that game. They’re things in the environment that make it harder or easier for creatures to survive and have babies. For example, if there's not enough food, animals might need to find new ways to get it, like digging deeper into the ground or swimming faster.

Think of a forest full of deer. If a drought comes, the grass gets shorter, so the deer have to stretch their necks higher to reach the leaves. Over time, the deer with longer necks survive better and pass on their long necks to their babies. That’s how evolutionary pressures help shape life, they push creatures to change in helpful ways.