​What is the purpose of the umbrella and what does the umbrella do?

The basic role of an umbrella is to keep out rain or shade. The structure of the umbrella is roughly three parts: the umbrella handle, the umbrella bone and the umbrella surface. The handle is the backbone of the umbrella, supporting the entire umbrella, mainly made of wood, bamboo, metal and other materials. The umbrella bone supports the entire umbrella surface, and it can be folded and stretched open, making it easy to carry. The umbrella surface is the most important part of the umbrella, which is responsible for sheltering from the rain, and is made of plastic sheeting, oilcloth, silk cloth and durable nylon cloth.