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-.
Answer:
It will eventually become unsustainable because of factors like food, water, space, etc.
A cigarette lighter considering the suspect touched it and left fingerprints
