Mantle convection is an important method of heat transport within the Earth. Mantle convection is the driving mechanism for plate tectonics, which is the process ultimately responsible for producing earthquakes, mountain ranges, and volcanos on Earth.
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Answer: C) stars in these regions are hidden by interstellar dust grains.</h2>
Explanation:
Some areas of the Milky Way seem dark because those are areas of the galaxy that are hidden by huge columns of interstellar dust that we cannot see through the visible range of the electromagnetic spectrum (which is the range in which our eyes see).
However, to solve this problem, astronomers use telescopes that work in the range of infrared and radio waves, to observe a little more through this intersetelar dust.
The largest water reservoir is the ocean, containing 97.3% of all water on Earth.
The ocean floor or seabed can be divided into three major regions: the continental margins, abyssal plains, and mid-ocean ridges.
Those living in a nation-state are often expected to do all of the following except defend the nation from detractors. Thus option (C) is correct.
<h3>What do you mean by Nation?</h3>
Nation refers to the territory where the people and live and they are governed by the same government. The example of the nation is United States, India, United Kingdom etc are the nations.
The people those are living in the nation are expected to spread the cultures and their norms, speak their national as well as the regional languages.
They are not required to the defend the nation from the detractors. Thus option (C) is correct.
Learn more about nationalism here:
brainly.com/question/1018147
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