Trees give off oxygen that we need to breathe. Trees reduce the amount of storm water runoff, which reduces erosion and pollution in our waterways and may reduce the effects of flooding. Many species of wildlife depend on trees for habitat. Trees provide food, protection, and homes for many birds and mammals.
Id say C but in reality it was more profitable because farmers had to pay slaves next to nothing if not anything and could have multiple workers in poor conditions so mass amounts of free workers saved them money and they could work them 24 hours a day until they dropped making the process go faster producing more than other competing farms. A sad truth from our past.. hope this helps!
A C D I think might be wrong tho