Answer:
Change in food source.
Explanation:
If there is a change in food source, then the organism will have to adapt to that change. For example, with Darwin's Theory on the finches on the Galapagos Islands. There were many different varieties from different size to different beaks. This was because of changes on food sources and they adapted to obtain them more.
Gamma-Rays have the shortest wavelength.
Sounds like the puppy has round worm, if that's the type of answer your looking for..
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The answer is none of the above because organic materials, gasses, and minerals are all component soils.
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