Answer: D. They are affordable for everyone to install.
Explanation: I hope this helps :)
Answer: 5
Explanation:
3 + 1 = 4 (a =10) 3+1+10=14
Answers:
Number 2: Pine Trees.
Number 3: The Coastal Plain.
Explanation for number 2: The lower part of the Coastal Plain does not have very fertile soil, so not many things can grow except for pine trees and brush.
Explanation for number 3: None needed.