I develop a 2D game. I have some 2D objects like vehicles. A vehicle has some children sprites. When I click one of the children, I want the root to be selected to move. You can assume this request is like grouping in design tools. Is it possible to select the root of the vehicle when selecting a child? I can select children in hierarchy window.
you can make an editor script for that
Take a look at this post which discusses various approaches to your problem In Editor: Select the parent instead of an object in the messy hierarchy it creates?