Answer:
The second option: "Even though Antartica is cold and has snow, it is a desert."
Step-by-step explanation:
This is the answer because by reading the paragraph, you will see that the main idea is stated in the first few sentences.
I would say
Balanced forces result in constant velocity: phase 3
Unbalanced force causes change in velocity: phase 4
The more unbalanced the forces are, the greater the changes in velocity is: phase 5
Hope this helps
