D a basic need for a constant supply of the item.
Downward sloping because demand is declining
<span>This is an example of, "medicalization and the social construction of health and illness".
</span><span>Medicalization is examined from a sociologic point of view regarding the part and energy of experts, patients, and enterprises, and furthermore for its suggestions for ordinary individuals whose self-character and life choices may rely upon the overall ideas of health and illness.
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You did not provide a list but I feel you should dress professionally and be prepared to talk in a professional manner. I hope this helps. :)
Answer:
Water has a much higher refractive index, so does the material that the animals are made of so you can really make that difference in how light moves through the materials very minimal; therefore you can't see them. Even a piece of glass underwater is very difficult to see because that glare just doesn't happen.
i did get this from g00gle so it may be considered pagerism so just try to put it in your own words
Explanation: