All aquatic organisms have gills as part of their respiratory system.
which of the following is true about the statement?

a) the statement is correct

b) the statement is incorrect as all aquatic organisms have lungs as part of their respiratory system

c) the statement is incorrect as al aquatic organisms rely on direct diffusion across their moist skin to exchange gases with their environment

d) the statement is incorrect as aquatic organisms use different methods of gas exchange, such as gills, lungs, and direct diffusion