Which accurately compares a benefit of Jamestown’s environment with a disadvantage? The marshy ground was good for growing tobacco, but it attracted mosquitoes that caused malaria. The rocky ground was a sign of large gold deposits, but the rocks in the soil broke all the plows. The old-growth forests were rich in timber, but putting out forest fires was a major problem. The island location made it good for trade, but the riverbank was too far to reach with a bridge.