Answer:
The Europeans brought many diseases with them that decimated Native American populations. Colonists and Native Americans alike looked to new plants as possible medicinal resources.
Clouds can cover up the sun, which is the natural source for heat everywhere. When the sun is not in sight, or thickly covered by clouds, this limits the suns radiation and heat waves therefore causing less light and heat.
Iron and Nickel.
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D. Exfoliation is the answer
