Imagine you have a toy box filled with blocks. When you take out a block to play with, you are moving it from its place in the box. This is like the word displace. It means to move something from where it was before.
Think about a duck swimming in a pond. When the duck swims, it makes the water move around. The water that was where the duck is now has to move somewhere else. The duck displaces the water.
Now, picture a big comfy chair in your living room. If someone moves the chair to another room, the chair is displaced from its usual spot. It’s like when you move your toys from one room to another, they are being displaced.
Finally, imagine a balloon that you let go of. The air inside the balloon pushes out and fills up the space around it. The air displaces the space around it, just like how you might move things around when you make room for new toys. Displace is all about moving things from one place to another, making room for something else.