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:

Salt marshes are coastal wetlands. Ocean tides bring in and take out salt - water. As tides change throughout the day, the amount of salt - water in the marsh changes, thus affecting salinity. River flow changes are not the main factor for daily salinity variation in salt marshes. While wind and rain can cause some mixing, tides have a more significant and regular daily impact. Salt - water collecting in low elevations doesn't explain daily variation.

Answer:

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