Okay kiddo, so let's imagine that you're playing a game with all your friends, and you're in charge of the game. As the game leader, you get to make all the important decisions and everyone else has to do what you say. This is kind of how the unitary executive theory works.
In the United States government, the president is like the game leader. They're in charge of making a lot of important decisions, like which laws to enforce and how to run the country. The unitary executive theory is the idea that the president should have a lot of power and control over how the government works.
So, just like how you might make all sorts of rules and decisions during a game, the unitary executive theory says that the president should have the power to make lots of important decisions about how the government works. This includes things like controlling what other people who work for the government can do, and how the government should enforce laws.
Some people really like the unitary executive theory, because they believe that it's important for the president to have a lot of power in order to make sure that the government runs smoothly. Other people, however, think that the president having too much power like in the unitary executive theory could be a bad thing. They think that it's better if different parts of the government have their own powers and can keep an eye on each other to make sure everyone is doing the right thing.
So, just like how you might have different ideas about how a game should be played, some people have different opinions about how the government should work. The unitary executive theory is just one idea about how things should be done – there are many other ideas out there too!