There are many reasons to why slaves were essential in the colonial economy:
Slaves were generally used more in the south, because large plantations were found there, which meant that the need for large amounts of workers.
Slaves provided cheap labors, and as they were not "citizens" of the US, they were not allowed their rights.
Slaves were also relatively easy to buy and replace, however, their survival rates were not that good after they traveled long distance.
etc.
hope this helps
Answer
B) Glucose molecules will diffuse out of the cell.
Answer should be A if multiple choice
I would think A - Volcanic eruptions can cause both global warming and global cooling.
The correct answer is F because they are here on earth natrully
