B. Deforestation is a way to clear land and plant more by humans but the other answers are natural things that happen in the environment.
Answer: 1) Angular separation equals 0.0000031 degrees
2) Angular separation in arc -seconds equals 0.011156"
Explanation:
For 2 stars separated by a distance 'S' and at a distance 'D' from the earth the angular separation in radians is given
Applying values we get
Now we know that 'π' radians equals 180 degrees thus the above value in degrees shall be equal to
2)
The angular separation in arc- seconds is given by
San Francisco
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