The answer is letter C.
Terrigenous sediments come from continental rocks, meaning they come from inland. The erosion of rocks from the environment (e.g. volcanic eruptions, rock weathering) causes the development of these sediments. These sediments may consist of sand, mud, and silt, that are usually carried to bigger bodies of water by rivers.<span />
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The Hawaiian Emperor seamount chain<span> is a well-known example of a large </span>seamount<span> and </span>island chain created<span> by hot-spot volcanism.</span>
One of the biggest environmental problems of sub-Saharan Africa is the deforestation. In order to produce food, or make some profit, the majority of the people tend to destroy the forests. This is usually done with the clear cutting or slash-and-burn methods. While this works on the short run, usually 3-4 years, after that short period the land can not be used as it has been severely degraded and eroded. In order to be able to continue producing food, the people continue to do the same, living behind large areas of barren and destroyed land. The deforestation also causes desertification, which makes the land unusable for generations to come or more, except if smart policies are not undertaken. The environment is totally destroyed as well, with numerous plant and animal species losing their habitats or being directly destroyed, putting them on the endangered list.
