Answer:
The depression was caused by a number of serious weaknesses in the economy. ... The lingering effects of World War I (1914-1918) caused economic problems in many countries, as Europe struggled to pay war debts and reparations. These problems contributed to the crisis that began the Great Depression.
Explanation: :)
Surplus agricultural production is necessary for development of a civilization. Aside from its annual flood, the Nile was a calm river, easily navigated, at least near its Delta. This made transportation easy, and helped the people of Egypt unite into a single kingdom.
One thing i know is they used the surrounding geography. The american colonist knew the land so well they could easily traverse the land and plan "sneek attacks" against the british
Oklahoma is a state that touches the northern border of Texas.
Answer:
the atmosphere and ocean once had no oxygen
Explanation: