2. PART B: Which detail from the text best supports the answer to Part
A?
A.) "Earth is the only planet known to have large amounts of liquid
water. Liquid water is essential for life. Earth is the only planet
where life is known to exist." ( Paragraph 3)
B.) "Earth has seasons because its axis is tilted. Thus, the sun's rays hit
different parts of the planet more directly depending on the time of
year." ( Paragraph 9)
C.) "Earth's parts once were seen as largely separate from each other.
But now they are viewed together as the 'Earth System.'" (
Para graph 16)
D.) "NASA studies Earth to learn about how the planet changes. Earth's
parts - land, air, water and life - are always changing. Some of the
changes are natural and some are caused by humans."
Paragraph 18)