Mud houses are cooler in summer and warmer in winter because

Mr. X was advised by an architect to make outer walls of his house with hollow bricks . The correct reason is that such walls (a) make the building stronger (b) Help keeping inside cooler in summer and warmer in winter (c ) Prevent seepage of moisture from outside (d) Protect the building from lightning

Statement: I. Mud houses are cooler in summers than stone-and-brick houses. II. Mud houses are occupied by the poor only. Conclusions: I. Poor people are more comfortable in summers than the rich. II. Stone-and-brick houses are more sophisticated than mud houses.

Sound is heard clearly in summer than in winter Why ?

Give reasons for the following facts: Some plants flower in summer and some in winters.