<h3><u>Occurrence of spring and neap:</u></h3>
- Spring tides occurs twice in every month annually. When the 'new or full moon' occurs than the 'gravitational pull of sun' is added or supplemented to the gravitational pull of earth's moon, it causes a surge in the ocean tides.
- In other words the high tide became even more higher and low tides much lower. This are called spring tides.
- After the seven days of spring days, the moon and sun appears at a right angle towards each other.
- The surge in the ocean tides becomes normal and the tides became moderate. These are called neap tides.
<span>Andesite:
</span><span>a dark, fine-grained, brown or grayish volcanic rock that is intermediate in composition between rhyolite and basalt.</span>
Answer:
Several types of evidence supported Hess's theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves. This evidence led scientists to look again at Wegener's hypothesis of continental drift.
<span>Continental drift was Wegener's hypothesis that Earth's continents were once part of a supercontinent that has since broken apart; plate tectonics is the theory that explains how continental drift happens.
Therefore, the answer is A.
I hope this helps!
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