You're asking about the tonicity of a 2% salt solution compared to a 4% salt solution. Here's the breakdown:

* Hypertonic: A solution with a higher concentration of solutes (like salt) compared to another solution.

* Hypotonic: A solution with a lower concentration of solutes compared to another solution.

* Isotonic: Solutions with equal concentrations of solutes.

In this case:

* The 2% salt solution has a lower concentration of salt than the 4% salt solution.

* Therefore, the 2% salt solution is hypotonic to the 4% salt solution.

Let me know if you have any other questions!