The location of the Arabia was such that it was able to connect to Africa, Asia and the Mediterranean areas. This allows the spread of culture, people, goods, ideas, etc from Arabia to the other areas they are connected to and vice versa. This played an important role in the expansion of the Arabia Empire especially in term of spread of trade and culture.
Answer: Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants. Pollutants can be natural, such as volcanic ash. They can also be created by human activity, such as trash or runoff produced by factories. Pollutants damage the quality of air, water, and land.
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Answer:A is the closest answer. If I'm wrong I'm sorry.
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Like most scientific concepts, that of gravitational waves emerged over many ... The implications of this discovery for the understanding of gravity were not lost on ... theory's fully developed equations proved that true gravitational waves could ... Einstein's skepticism largely impeded research in the field until after his death.
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