It should be C.United States...Hope this helps
Answer: addressing environmental issues that have resulted from rapid economic development, such as soil erosion, water pollution, desertification and oil spills.
Explanation:
Answer:
special relativity and general relativity. Special relativity applies to all physical phenomena in the absence of gravity. General relativity explains the law of gravitation and its relation to other forces of nature.
Explanation:
It is un flexible meaning no substance can go through it
