Question

a local government wants to monitor the health of an estuary. which of the following is the most critical physical property to measure over time to determine the impact of tides on the ecosystem?
a. dissolved oxygen
b. salinity
c. turbidity
d. temperature

Explanation:

Salinity is a key physical - property in estuaries. Tides can significantly affect the salinity levels in an estuary as they bring in seawater with different salt concentrations. Dissolved oxygen is more related to biological and chemical processes, turbidity is about water clarity and suspended particles, and temperature is also important but less directly impacted by tides compared to salinity.

Answer:

B. Salinity