Correct Answer : All of the above
Explanation : Following things are true about Babylon.js :* It is an open-source framework* It is one of the most popular 3D game engines* It is a JavaScript framework for 3D game development
Correct Answer : Raycasting
Explanation : Raycasting is a method used in Babylon.js to identify the intersection of a ray and objects in the scene.
Correct Answer : registerAction
Explanation : With registerAction method an action is registered with the action manager.
Correct Answer : Clear
Explanation : Clear method, clears all actions that have been registered with the action manager.