Answer:The presiding officer of the chamber is the Speaker of the House, elected by the Representatives. He or she is third in the line of succession to the Presidency.
Explanation:
Just compare a river map of West Africa to a map of West African kingdoms.
You can clearly see that all of these kingdoms form around the Niger River.
More support to this: None of these other rivers are even in Africa: The Thames is in England, the Indus is in Pakistan, and the Euphrates runs through the Middle East.