Question

which of the following has the lowest salinity? marine ocean estuary lake

Explanation:

• Marine and ocean waters are typically saline.
• Estuaries have a mix of saltwater and freshwater but still have some salinity.
• Lakes can be freshwater (with very low salinity) depending on their source (e.g., fed by rivers with little salt input and no significant evaporation - concentration of salts).

Answer:

Lake