Answer:
<em>C. It led to concerns regarding the dangers of greenhouse gases.</em>
It is inhumane first if you look at it logically all the words mean the same except for boring which does not make sense.
1. The earth's rotation causes day and night because it exposes certain parts of the earth to the sun as it rotates.
2. The earth rotates 365 days.
3. Saturn's rotation is faster while it's revolution is slower than Earth's.
4. Because the earth rotates from west to east.
6. Water on earth allows most organisms to live.
8. Gravity pulls the moon toward the earth.
