The ability of an animal to maintain a stable internal environment is called homeostasis.
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The best way of doing it without potentially causing harm to yourself, would be "wafting".
Answer:
In this case, the scientist want to test the presence of the limonite in the yellow rocks, So, proposed hypothesis should include the color of rock they want to observe and the posssible outcome, which need to be tested. So, a proposed hypothesis can be: The rocks, which have yellow color are made up of mineral lime.
