The demand curve demonstrates the increase or decrease in the demand for a specific product. IE: the price of a certain product and the amount that a consumer is willing to pay at that price.
Answer:
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Explanation:
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Islam spread to Mali mainly through trade with Arab traders.
Answer: B. Improving Agricultural techniques with Irrigation and fast rising rice increased food supplies.
Explanation:
The Song Dynasty of China which lasted from 960 - 1279 AD saw a great increase in population as well as income. This was due to improvements in Agriculture that led to increased food supplies which could support a larger population.
Some of these improvements included irrigation as more farming commenced on the Yangzi River which increased crop yields as well as the introduction of different types of rice such as fast rising rice which meant that more rice could be grown in planting season.