Can you tell the main reason why the Chinese build towers besides beautification of the city?（ ） A: for playing game.，for setting fireworks.，for military defense.，for traffic flow.

People do not buy cosmetics to obtain some of its chemical components, but to obtain beauty, from this point of view, the beautification function that cosmetics product provide is a case of（ ）. A: Core product layer B: Potential product layer C: Form product layer D: Additional product layer