Answer:
Trade is a basic economic concept involving the buying and selling of goods and services, with compensation paid by a buyer to a seller, or the exchange of goods or services between parties. Trade can take place within an economy between producers and consumers. International trade allows countries to expand markets for both goods and services that otherwise may not have been available. It is the reason why an American consumer can pick between a Japanese, German, or American car. As a result of international trade, the market contains greater competition and therefore, more competitive prices, which brings a cheaper product home to the consumer.
Because it is a fertile floodplain! hope that helped <3
Evidence of attacks have been found
B. The actual number of farmers increased between 1840 and 1900.