Question

Ans. Animal fiber, wool, silk, camel house
(5) Which natural substances were used in construction work previously and which man-made
substances are used these days?​

Answer 1

Answer:

Many naturally occurring substances, such as clay, rocks, sand, and wood, even twigs and leaves, have been used to construct buildings. Apart from naturally occurring materials, many man-made products are in use, some more and some less synthetic.