Answer:
C. Regulate how much carbon dioxide a country can emit

Vacuoles store water, food, and waste. The endoplasmic reticulum (ER) is a series of tunnels throughout the cytoplasm. They transport proteins from one part of the cell to another. Ribosomes are the protein factories of the cell.
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The independent factor is typically the unit on the x axis, while the dependent is on the y axis. An Example would be miles per hour, miles would be graphed on the y axis, and hours on the x axis.
Answer:
D. the dynamic regulation of an organism's internal environment to maintain conditions suitable for survival.
Explanation: