Which of the following IS NOT a reason why organisms in an estuary have special adaptations?

a. exposed to intense sunlight during the day

b. salinity of the water in an estuary is constantly changing

c. dry part of the time and underwater part of the time

c. dry part of the time and underwater part of the time. In estuaries, normal organisms may not thrive because of the harsh environment conditions. Salinity or salt content changes invariably, temperature also varies, as well as temperature, and tidal currents change direction every 6 hours.