An alternating decision tree is a kind of chart that helps people make choices. It's like a map that helps you figure out what to do next.
So let's pretend you are trying to decide what to wear to a party. You want to be comfortable but also look good. An alternating decision tree can help you figure out what to wear.
The first question in the decision tree might ask you if it's cold or warm outside. If it's cold, it might suggest wearing a sweater. If it's warm, it might suggest wearing a t-shirt.
After that question is answered, there might be another question about what kind of pants you want to wear. If you chose a sweater, it might suggest wearing jeans. If you chose a t-shirt, it might suggest wearing shorts.
And so on until you have a full outfit picked out.
Basically, an alternating decision tree helps you make choices by asking you questions based on your previous answers until you get to an answer that fits your needs best.