Salt concentration (salinity) of the sea measured in parts per thousand is
1. 10-15
2. 30-70
3. 0-5
4. 30-35

(d) Next to temperature water is an important abiotic component influencing the life of an organism/organism. In an oceanic ecosystem, the organisms face water-related problems like pH, the salinity of the water. The salt concentration (salinity) of the sea measured in parts per thousand is 30-35.
The other three options are incorrect