The correct answer is:
An understanding of the number and size of leftover planetesimals in the early solar system.
The giant-impact hypothesis proposes that the Moon was created out of what was left of a collision between Earth and an astronomical body the size of Mars, around 4.5 billion years ago, in the Hadean eon. The heavy bombardment was a period when leftover planetesimals hit planets during the solar system's first hundred million years.
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A. address the opposition is the correct answer.
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D) the oil and gas resources of the Middle East
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the Greeks, Byzantines, Ayyubids, Mamluks and Ottomans – the ... Medieval Arab historians say that the history of the citadel as a fortified acropolis began under Nicator. In ...
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