The troposphere is the lowest level of the atmosphere, so it is in contact with the Earth's surface. In contrast, the stratosphere is located above the troposphere, so it is not in contact with the Earth's surface. ... The air density and air pressure are much lower in the stratosphere.
...traveled to Sacramento for a business meeting.
Colin draw back the curtain from his mother's portrait because he wants Mary and Dickon to see her.
<h3>Why did Colin draw back the curtain?</h3>
He covered the portrait because he dislikes that she is laughing while he is so ill and unhappy and because he thinks of her as his treasure, one he does not wish to share with anyone.
However, he drawn back the rose-colored curtain in his room so that the portrait of his mother can be visible now.
Therefore, the Option A is correct.
Read more about mother portrait
<em>brainly.com/question/12043245</em>
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