In the scene graph, there is a hierarchy of objects where the scene is the root and parent. In our scene, we can add lights, 3D objects and meshes and these are considered children of the scene.
We can group meshes by adding them to a single mesh. Once we group meshes, the meshes will adopt the same properties as its parent by default.
For Transformations, we want to show how changes to a parent object will affect its children.