A wetland can be defined as the place which is either formed temporarily or permanently by water which has abundant amount of oxygen in it.
There are many factors that determine the wetland. Type of vegetation, type of aquatic fauna, type of soil and location and many more factors determine wetland.
Location is one of the factors but not a sole factor so the given statement is not true.
They replace the lost ions by active uptake through active transport
of ions from the surrounding waters. This is exhibited in freshwater fishes that
actively take in these ions through the gills. Most of the ions involved in osmoregulation in freshwater are those of Na+ and Cl-.