The physical geography of East Africa is dominated by the Great Rift Valley, which extends through the middle of the region from north to south. Associated with the rift valleys are vast savannas such as the Serengeti Plain, large lakes, high mountains, and the highlands of Ethiopia.
The Silk Road connected them to the Fertile Crescent and other western countries and gave them new goods . Before the Silk Road china suffered from isolation because of the natural boarders around it
The National Magazine Youth's Companion
I believe the answer would be C, burning fossil fuels. Oil and gas is made up of the remains of microscopic plankton. Over millions of years the remains become the carbon-rich coal, oil and gas we can use as fuel. When fossil fuels are burned they release carbon dioxide into the atmosphere, thus contributes to global warming.
Answer:
I think it is C, what happens to us after we die.
