Thousands of years ago, people didn ’ t live in cold places because they didn ’ t know how to keep themselves warm. Later they learned to make clothes .when an animal was killed, they made use of its skins to cover their bodies. The skins kept them warm . Nature is people ’ s good friend. It once helped people find fire, when lightning hit a forest and started a fire. People took some fire to their homes. Soon people found the food cooked tasted much better, so they began to use the fire to cook food. Today it ’ s easy for people to make fire because they have matches, lighters and other kinds of heaters .They can make fire at any time they need.