Answer:
Its D education and ability
Explanation:
I took the test
ur welcome:)
Explanation:
1) Jupiter is a planet made entirely out if gas, therefore humans can't walk on Jupiter and Jupiter lacks oxygen.
2) Uranus is a Ice giant, that means it's very cold and humans would most likely freeze to death. Also Uranus lacks oxogen..
3) Neptune is the farthest known planet from the sun, that makes Neptune too cold to be lived on.
4)Pluto is far from the sun, which would make it very cold
5) Mars would be perfect for humans, but the o-zone lacks of oxygen. Scientists say, Mars could support like if we simulate life on earth. Mars is also humid enough to support life.
So that people have to pay for their effort. As you know everyone in the community needs to earn money somehow in order to live.
Also used for copy protecting in short term to honor them as well
The answer is black holes. I hope this helps