The answer is b. Measure productivity. Good luck!
Answer:
The physical and chemical properties of seawater vary according to latitude, depth, nearness to land, and input of fresh water. Approximately 3.5 percent of seawater is composed of dissolved compounds, while the other 96.5 percent is pure water. The chemical composition of seawater reflects such processes as erosion of rock and sediments, volcanic activity, gas exchange with the atmosphere, the metabolic and breakdown products of organisms, and rain.
Explanation:
A carrier is a child who carries the genes of from parents but the gene doesn't show itself because of being masked by the dominant gene.
