Okay, little buddy! Let's talk about vehicles, like cars, buses, and trains. When we say 'which vehicle has this destination,' we're asking about where a vehicle is going.
Imagine you see a big yellow school bus. That bus is going to the school! The destination is the school. So, you can say, 'The school bus has the destination of the school!'
Now, if we see a shiny red fire truck, where is it going? Maybe it's going to help at a fire! So, you can say, 'The fire truck has the destination of the fire!'
Each vehicle has its own special place it goes, and that's what we call the destination! Remember, cars can go to homes, buses can go to schools, and trains can go to faraway cities. Cool, right?