Question

the salinity in salt marshes can vary throughout the day because _. a. river flow changes throughout the day b. the amount of salt water in a marsh depends upon ocean tides c. daily winds and rains result in salt and fresh water mixing d. salt water collects in the lowest elevations please select the best answer from the choices provided

Explanation:

Ocean tides bring in and take out salt - water from salt marshes. As tides change throughout the day, the amount of salt - water in the marsh changes, thus affecting salinity. River flow changes may not directly impact salinity as much as tides. Daily winds and rains can have some effect on water mixing but tides are the main factor. Salt - water collecting in low elevations doesn't explain daily salinity variation as well as tides.

Answer:

B. the amount of salt water in a marsh depends upon ocean tides