Have you ever been to the beach and seen how the waves move and crash onto the shore? Well, just like those waves, sometimes big changes happen in the world that affect a lot of people. When we talk about a "wave of change," we mean a big change that moves through society and affects many aspects of our lives.
Think of it this way: Imagine you and your friends are all in one big swimming pool. Suddenly, someone big jumps into the pool, creating a big splash that sends ripples across the surface of the water. Those ripples are like a wave of change - they move out from where the person jumped in and affect everything else in the pool, making waves and changing the way the water moves.
In the same way, a wave of change might start with one big event, like a new law being passed, or a major event happening in the world. That event sends a ripple out that can spread and cause other changes to happen as well. For example, if a new law is passed that makes it easier for people to buy electric cars, that might cause more people to start buying them. Then, as more people buy electric cars, it might make it easier to build more charging stations or to create new jobs in the electric car industry.
So when we talk about a "wave of change," we mean a big change that starts with one event and affects many different things in the world. Sometimes these changes are good (like the example of the electric cars), and sometimes they might be bad (like a natural disaster that affects many people's lives). But either way, when a wave of change is happening, it's important to pay attention and try to understand how it might affect you and the world around you.