59/59 what is an isopycnal? a surface mixing zone a zone of rapid salinity change a layer of constant…

59/59 what is an isopycnal? a surface mixing zone a zone of rapid salinity change a layer of constant temperature a layer of constant density
Answer
Brief Explanations:
An isopycnal is a layer in a fluid where the density is constant. Density in fluids is affected by factors like temperature and salinity. In oceanography and fluid - related studies, isopycnals are important for understanding the stratification and circulation of fluids.
Answer:
D. A layer of constant density