How do oceanographers use their measurements of the conductivity of
seawater?
o
a. to estimate the amount of marine life in the water
o
b. to avoid electric currents in the water
o
c. to determine the water's temperature
o
d. to calculate the water's salinity

d

The salinity of ocean water can be determined by measuring the conductivity of the water. ... The electric current is flowed through the water and as we know salt water is a good conductor of electricity it will pass the current fast. Using this technique oceanographers determine the salinity of water

Explanation:

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.