A. When the previous president has resigned his previous post
b. When the previous president had died from sickness
If either these two situations would occur then the vice president will take his place as the new president of the country.
To grow larger and more powerful. They didn't have to pay people to work so they were able to keep to money and continue to buy more land and grow.
Should be the second answer (b)
The Niles water would be collected during the summer season because that's when the water would rise. This helped the Egyptians to grow their crops however the Nil would often flood and cause destruction to the surrounding land and crops.
