On tropical islands, shelters have always had great umbrella-like roofs to shed heavy rains and almost no walls so cooling breezes can pass through. We need shelter Over the centuries people have found that they cannot live without protection from wind, sun, rain, snow, and extreme heat and cold. Primitive people first found shelter in the natural environment, caves. People later built their environment for protection, and although thousands of years have passed, we still build our homes for this reason. Even outside we look for the shade of trees when it is hot.
Climate extremes affect the form of the environment.
Although not always apparent, every shelter, even in a moderate climate, responds to people's basic needs for light, air, and protection from the elements. We build buildings and rooms for privacy and for places for our different activities. If we had to, we could eat, sleep, cook, read, play, and bathe in the same room. Just as we don't use a single room for many purposes, we don't build a single building to be a church, food market, and factory. Most buildings serve a number of uses.