The relative concentration of water in a hypotonic solution is high. The correct answer between all the choices given is the first choice. I am hoping that this answer has satisfied your query about and it will be able to help you.
Answer: The correct answer for the fill in the blank is High.
Hypotonic solution is the one, which contains less concentration of solute (like salt) as compared to the solvent (water).
In other words, in a hypotonic solution, the concentration of solvent is higher than the concentration of solutes.
Thus, the relative concentration of water ( which is a solvent) in a hypotonic solution is high.