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Answer:</h2>
<u>c. Solstice</u> describes days when sun's rays directly hit Tropic of Cancer and Tropic of Capricorn.
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Explanation:</h2>
The solstices occur due to the declination of the Earth's orbital movement around the sun. During this declination, the axial tilt is 23.5°. Furthermore, solstice's occurrence is during time the sun's direction is overhead the moon.
In Northern hemisphere, the declination is towards Tropic of Cancer with the axial tilt of 23.5°N. It occurs on June 20 & 22 while in the south the normal period of occurrence is between December 20 and December 23. In the south, the solar declination hits Tropic of Capricorn at 23.5°S.
Answer:
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Overfishing at sea can lead to an extinction.
Overfishing is a serious problem, it affects lot of marine species, at every water corner of the Earth. If the fishing is not controlled strictly it leads to extinction of the marine wildlife, lot of species have already been extinct, thousands are on the verge of extinction. Also, the extinction of a single species makes big problem in the ecosystem, removing lots of species has huge impact on lots of ecosystems that are connected and the consequences are irreparable.
Answer:By far the most abundant volcanic gas is water vapor, which is harmless. However, significant amounts of carbon dioxide, sulfur dioxide, hydrogen sulfide and hydrogen halides can also be emitted from volcanoes
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