I think it's A but here's an explanation anyway: as you heat the crude oil, the different hydrocarbons, having different boiling points, boil and evaporate up the column. Those with lower boiling points, shorter in chain length, will condense nearer the top of the fractional distillation column. Those that are more viscous, larger in chain size, will have high boiling points, so will evaporate last and condense lower down in the column. Therefore, you achieve all the different oils / materials (oil, petrol, gasoline, tar etc etc). I hope this helps. If not, then a good website to use is 'BBC bitesize, fractional distillation'.
Answer:
Increase in number of people displaced from their homes.
Explanation:
Hurricanes bring strong winds, heavy rain, and the threat of flooding or storm surge. During a hurricane, the wind speeds increase dramatically, and the hurricanes can even spawn tornadoes.
Soil erosion is not decreased, but rather increased drastically and entire beaches are often swept away by the winds and rains. If anything, air pollution over the urban area hit by the hurricane would be temporarily cleaned up by the storms.
The best answer for this question would be:
detailed hieroglyphic writing system
The Mayans had exceptional writings that recorded what they
did throughout history. They made these writings in order to keep track of the
political rulers and the culture that they were establishing.
Cold air is correct answer
And scientists say it will take natural processes 6,000 years to refill the reservoir
