Explanation- The sand present on the beaches has to stay there and stick to something to form ground. This ground is the Bedrock present at the beaches which offer a solid grounding over which the sand is held on to.
If this Bedrock would not have been present and would have some must completely or it would have been really difficult to stand as standing on it would have led to submerging of legs into the sand.
The person would gain weight because the undigested food would sit in the person's body. The person would not lose or gain weight, but it would take longer for the body to use the food that was eaten.
Answer: the longitude line rotates with Earth, 360 degrees in 24 hours.
Explanation: In the old days, the position of the sun was used to tell which time of the day it is. But more modern findings, has shown that the longitude line matters too.
