Answer:
Green house effect and human activity.
Explanation:
-The green house effect: Some gases in the atmosphere trap the heat and doesn't allow it to scape making the Earth warmer.
-Human activity: The industrial activities have increased the carbon dioxic levels that have contributed to the higher temperatures. Also, deforestation, fluorinated gases and fertilisers containing nitrogen have contributed to climate change.
A comet is a lump of rock and ice. Spacecraft have flown by comets. A comet only has a tail when it is near the sun. Most comets come from the Kuiper belt. A comet has actually been witnessed hitting a planet. Most comets have short orbital periods.
A comet is a tiny, frozen entity in the Solar System that heats up and starts to emit gases as it approaches the Sun. This process is known as outgassing. This results in an apparent atmosphere or coma, and occasionally a tail as well. These occurrences are caused by how the solar wind and solar radiation interact with the comet's nucleus.
The size of comet nuclei varies between a few hundred meters and tens of kilometers, and they are made up of loose clumps of ice, dust, and tiny rocky particles. A comet's orbit is typically very eccentric and elliptical, and its orbital period can range from a few years to possibly millions of years.
Learn more about Kuiper Belt here:
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When the prediction about the population of a country is going to increase in next two decades is made , what might be the result of the population increase is option B which are Basic needs, such as food and water, will be scarce.
<h3>What is overpopulation?</h3>
Over population serves as the increase in the number of the population of a region which bring about the scarce of resources among them.
Therefore, what might be the result of the population increase is option B which are Basic needs, such as food and water, will be scarce.
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I think the correct answers from the pool of choices above are options A, B and C. <span>Management of the earth's resources should be handled in every level of the society may it be the local, the national or the global. It should be managed by everyone. Hope this helps.</span>
