Functional analysis is a way of studying something and looking at the different parts of it. It helps you understand how different parts work together and make something happen. For example, if you are looking at a car engine, you might break it down into smaller parts such as the pistons, spark plugs, fuel pump, and more. You can then look at how each of these parts works to make the car engine run. By understanding the pieces, you can figure out how they relate to each other and why they all work together to make the car engine run.