12 points No links, I can’t open

1. Which of the following is most responsible for a localizing area of cold surface water with a large amount of fish?
A. Increased salinity
B. Increase DO levels
C. Surface currents
D. Upwelling

2. What role do oysters play in estuaries?
A. Oysters improve the water quality by removing excess nitrates; denitrification
B. Oysters help to stable the shoreline
C. Oysters protect juvenile of different fish species
D. Oysters remove carbon dioxide from the atmosphere

3. Organisms in which ecosystem have to deal with many environmental changes everyday?
A. Estuaries
B. Hydrothermal vents
C. Intertidal
D. Polar ice caps

4. How does the salinity of the ocean compare to the salinity of an Estuaries?
A. The salinity of the ocean in the estuary is exactly the same
B. There is greater salinity in the estuary
C. There is greater salinity in the ocean
D. The estuary has no salinity