The answer is E.
A, B, C, and D are either irrelevant or already included.
Highwall mining is often used when excavating an open-pit mine becomes too expensive. There are many advantages over underground mining, including the fact that it is both more cost-effective and involves less lead time.
Answer:
sunlight:elevation :global warming
The answer is B. The Interoceanic Highway
Answer:
C
Explanation:
A and D just doesn't make sense, B is wrong because they have tourists that may spread diseases, so it should be C.
Let me know if you got it right.
