How to remove game object in prefab in AR Foundation

Hi, i want to know how to remove 1 game object in my prefab. My project flow is : I place the object after tap it, then a lot of button clicked n animation played, after a few min at last one of the game object prefab will be destroy after i clicked another button, but i dont know how. Im trying this approach after doing a lot of normal multiple way to destroy that one game object. Please help me