Ocean Salinity and The Factors Affecting It

Q. Salt in the ocean comes from which of the following sources?

1. Runoff from the land
2. Rain in the sea
3. Openings in the sea floor
4. Ship cargo leakage

Q. Which among the following terms describes a line joining two points in the ocean with the same percentage of salinity?

1. Isotherm
2. Isobar
3. Isohaline
4. Isoquant