The creation–evolution controversy is about the question of whether people and things have always been here, or if they changed over time. The controversy centers around the idea of evolution, which is the idea that living things change over generations to become better suited for their environment. Some people believe that God created the world and everything in it, including people, and that nothing has ever changed.
Others believe that over millions of years, living things have changed to become the way they are today. This idea is called evolution, and it says that living things change over time to become better-suited for their environment. Evolution explains how things like plants and animals can change over time if their environment changes.
So, people disagree about this topic because some people believe God created everything the way it is and nothing ever changes, while others believe things change over time.