Answer:
D is the right one i think, biological Adaptation delete this answer if it is wrong
Explanation:
<span>C. to supply hormones
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Is there suppose to be a picture?
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
The toxins are the substances which decreases the conc. of oxygen in wzater and increase toxicity
