The Columbian Exchange is marked by the exchange of plant and animal life between the Old and New Worlds. The exchanges<span> of plants, animals, diseases and technology transformed European and Native American ways of life.</span>
Explanation:
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Most Southerners were wealthy people who invested most of their money in land especially cotton farming. This is because there was growing demand for textiles. They also invested in slaves so they preferred shipping via rivers and seas. The answer to our question is water travel.
The correct answer is D)macadam. Macadam was an invention keyed by a Scottish man who changed the way we view paving of roads and highways. Macadam is a mixture of small stones crushed together with asphalt, the sticky, black material used for both concrete and macadam. The name Macadam comes from the engineer's name, which was John Loudon McAdam. There had been other attempts at macadam before McAdam, but McAdam improved it and his was the first to arrive in the United States.