Answer:
★ Concentration and Temperature.
Explanation:
Scientists are greatly concerned about the effects that rising carbon dioxide concentration and temperature will have on organisms in the future.
Answer:
D
Explanation:
As a result, when a variety of minor events led to gradual price declines in October 1929, investors lost confidence and the stock market bubble burst. Panic selling began on “Black Thursday,” October 24, 1929.
Answer:
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