Man has been facing many types of problems since his entry on the earth. The kinds of problems have been changing from time to time. In the Stone Age his basic problems were food and self protection. To solve them he made huts and started…
Man has been facing many types of problems since his entry on the earth. The kinds of problems have been changing from time to time. In the Stone Age his basic problems were food and self protection. To solve them he made huts and started…