Answer:
a.
Explanation:
The air moves faster across the top of the surface and exerts less pressure on the air below and thus due to difference in air pressure the top roof is lifted.
hence the correct option is pressure underneath them is reduced.
Answer:
option (c)
Explanation:
As the wind blows from upper side, then the pressure at the above side is reduced and hence the pressure at the underneath of the surface is increased so that the roofs blown away.
