Okay kiddo, sometimes when people have ADHD, they have a hard time paying attention to things they need to focus on. This is called "predominantly inattentive" because it mostly affects their ability to pay attention. It's kind of like when you're watching your favorite cartoon, but then you start to daydream and your mind wanders away from what's happening on the screen.
People with ADHD predominantly inattentive may also have a hard time remembering things and keeping track of their thoughts. It's like when you try to remember all the things you need to bring to school in the morning, but you forget some of them because you got distracted by something else.
Sometimes, people with ADHD predominantly inattentive can also have a hard time getting organized and following through on tasks. It's like when you start to clean your room but then get sidetracked by playing with your toys, so your room never really gets clean.
But don't worry, there are ways to help people with ADHD predominantly inattentive! They can work with doctors and maybe take some medicine that can help them focus better. They can also learn strategies for staying on task and keeping things organized. It's kind of like having a superhero power that you just need to learn how to control!