Respuesta :
Answer;
D. silver
Explanation;
- Ocean is rich in natural resources both living and non-living resources. Living resources in the ocean which includes fish, which are used both for commercial and domestic purposes.
- Oil and natural gas are examples of most variable non-living resources found in the ocean. Additionally, the ocean is mined for minerals such as salt, sand, gravel and some manganese, iron, nickel catalyst and cobalt found in the deep ocean.