Savannah’s location contributed to the city’s early economic success because it enabled the city to

Unfinished question :/ can’t answer w/o other information

sediment does not produce more sediment. sediment is carried into the water by rain runoff, rivers, wind, and other forces. Such materials settle to the bottom, on top of the sediment that is already there, so the depth (thickness) of the sediment layer increases over time.
hope this helped:)