Answer:d
Explanation: over time water evaporates which leaves you with the white crystals mass
Answer:
Intermolecular forces
Explanation:
Intermolecular forces cause surface tension.
Source info:
"Surface tension, capillary action, and viscosity are unique properties of liquids that depend on the nature of intermolecular interactions."
(11.S: Liquids and Intermolecular Forces (Summary)https://chem.libretexts.org )
The concentration of a solution can be changed by adding solute. More solute=more concentrated