The answer of how it is convert is the sun generates energy
by slowly contracting in size; converting gravitational potential energy into
thermal energy and this is called gravitational contraction. Gravitational collapse is the narrowing of an
astronomical object due to the effect of its own gravity, which tends to draw
matter inward toward the center of gravity.
The answer to your fine question is D.
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Answer:
It's a war for control of the world. ... The Americans, on the other hand, in 1914-17 usually called it the European War. Once the United States joined the war, of course, the American media could no longer refer to it as a European war: so it became the World War. That was the first large-scale use of the term in English.