<span>simple organic molecules can form spontaneously under conditions like those thought to prevail early in Earth's history</span>
<span>Option D correctly describes seafloor spreading. Seafloor spreading is a process which typically occur at middle ocean ridges where new oceanic crusts are formed as a result of volcanic activity. These oceanic crusts then gradually move away from the ridge.</span>
<span>A. Leyte Gulf.
Upon the return of the Americans in the Philippines, the Battle on the Leyte Gulf emerged as one of the largest naval battles in history wherein the Americans are victorious against Japan.
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Vaccines and shots are typically made of a small controlled portion of the virus or disease to cause immunity to the large scale types.
