C. only the wealthy can campaign
It begins in the high mountains of Tibet (southwestern China), flowing northwest through the Jammu & Kashmir region of India and Pakistan, then generally south through Pakistan, ending in the Arabian Sea. The Indus, through a series of dams and canals, provides much of the irrigation and power for central Pakistan.
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Besides the obvious amount of casualties that American troops took, it really turned the public against an already horribly unpopular war. This essentially was the turning point in public opinion.
Answer:
They investigated nature by studying it and watching what it looks like.
Explanation: