Today, the annual rate of tectonic plates movement is observed and measured by satellites.
So, the answer is option A. Satellites.
~Hope this helps!
The correct answer is letter B. increase deposition of sediments upstream. The negative effect of using too much water for the irrigation of crops is that it wash out sediments and these sediments are brought down the water streams.
Answer:
The volcano continued to spit ash through the end of April, forming two large craters which eventually merged into one.
Sub-Saharan Africa<span> is, geographically, the area of the continent of </span>Africa<span> that lies south of the </span>Sahara<span> Desert. Politically, it consists of all </span>African<span> countries that are fully or partially located south of the </span>Sahara<span> (excluding Sudan, even though Sudan sits in the Eastern portion of the </span>Sahara<span> desert).</span>
