How is the pacific ocean a roadway?

If I am thinking of the right ocean, there is a roadway tunnel underneath the ocean. 

Yeah I was gonna say that ocean I forgot which one though

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.

Answermost of the time it would be ground into fine sediment,and sometimes they are carried away from the original location;