Answer: B. Annual river floods replaced the soil, which improved the crops.
Explanation: Annual floods enriched the soil by dragging nutrients through the water, improving and speeding the growth of crops.
Answer: An economic system is a means by which societies or government organize and distribute available resources, goods and services across a geographical location. There are varieties of economic system in use throughout the world today. Example of some of them are capitalism, socialism, communism, etc.
An economic system is an economic order, a system of production, resource allocation and distribution of goods and services within a defined territory. It involves the corporation of the various institutions, agencies, entities , decision making processes. All economic structure are based on three different questions, which are what to produce? How to produce ? and for whom to produce? . Economic system involves how these agencies and institutions are linked together and how informations flows between them.
Federal government is better than unitary government because : The power is not concentrated in only in the centre but it is distributed at the state or lower levels as well. This helps to avoid conflicts.The federal system is notorious for the diffusion of authority to a point where it is impossible for citizen to assign
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The Long March most commonly refers to the transfer of the main group of the First (or Central) Red Army, which included the leaders of the Communist Party of China, from Yudu in the province of Jiangxi to Yan'an in Shaanxi. In this sense, the Long March lasted from October 16, 1934, to October 19, 1935.
