The seafloor holds promise as a source of many natural resources, including valuable metals. as demand for natural marine resources increases, mining these resources from the seafloor also increases. one concern of seafloor mining is the disruption of the seafloor habitat. which of the following describes the most likely impact of seafloor mining on the surrounding marine environment? (a) alteration in seafloor sediments rich in carbon would cause loss of species and an unbalanced population in marine food webs. (b) increased levels of metals in the ocean would result in decrease of marine bivalves due to weakened shells. (c)methane gas would pollute the marine environment and cause an overabundance of bacteria that feed on it. (d) nonrenewable resources in the marine environment would become depleted and affect the balance of the ecosystem.