Why were forms of entertainment such as movies and board games popular in the 1930s?

Those forms of entertainment were very popular in the 1930's because in the 1930's thats when the Great Depression was still going on so all of the unemployed people during the Great Depression wanted to at least have some fun without having to spend a whole lot of money.

They relied on the annual Nile flooding to create fertile soil.

Explanation:

This is because the Ancient Nubia lived with the Egyptians around the river Nile and they depend on river Nile for flooding and growing of grains. They were also know as those who posses archery skills including their women too. They were mostly buried with their archery equipment.