It was used to transport goods, and was also that earliest places know to start civilization. Was later abandoned due to unpredictable floodings
Answer:
One of the primary reasons for the reinvigoration of slavery was the invention and rapid widespread adoption of the cotton gin. This machine allowed Southern planters to grow a variety of cotton - short staple cotton - that was especially well suited to the climate of the Deep South.
Explanation:
Answer: A.
Explanation: As you can see, this skeleton buried in a hole is wearing <em>jewelry, </em>which is why A. is most practical!
The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen
