I would go with D, because acid can be reduced by using it less
South America is a continent that has a variety of climates, but the predominant one is the tropical climate.
The tropical climates are climates that appear on and in close proximity tot he Equator, and they are not monotone, but instead differ from one another. From the tropical climates that dominate the South American continent, the most widespread are the tropical rainforest and the tropical grasslands, which account for most of the tropical climates, with the tropical semiarid and tropical arid climates occupying much smaller areas on the continent, mostly alongside the Pacific coastline.
The Amazon rainforest is the trademark of South America, and it is the biggest tropical rainforest in the world, occupying huge portion of the northern half of the continent, with the tropical grasslands occupying large ares both north and south of the Amazon.
The youngest rocks are found at the mid-ocean ridge
Obviously the sun, unless we manage to make speed of light spacecraft like in startrek.
Answer:
We can say that this is the correct answer as in this period was on of the most important centers in the world.
Explanation:
Baghdad was the capital of Caliphate until 1258 and was regarded as one of the largest and most important cities in the world. It was a crossroad of trade and people from the whole world were coming here to trade. Of course, Abbasid Caliphate was of the largest countries of that period and stretched across two continents, which enabled Baghdad to be an important center.
