As for the first part, Cost, Radiation exposure to humans, No water or heat, and unfit soil. As for the second, Astronomers, Botanists, and obviously your fair share of rocket scientists and math matitions for the way up.
Answer:
He fails to see things in the inkblots.
Explanation:
D is your answer
1: sensable
2:enjoabley
3:possably
4:considrably
5:sensably
6:enjoyable
7:considerable
8:possable
