Name the two factors that affect water potential.

Explanation

**Step-by-Step Solution:**

1. **Understanding Water Potential**: Water potential is defined as the potential energy of water in a system. It is a measure of the tendency of water to move from one area to another and is denoted by the symbol Ψ (Psi).

2. **Identifying Factors Affecting Water Potential**: There are two main factors that affect water potential:
- **External Pressure**: This refers to the pressure exerted on the water in a system. An increase in external pressure will lead to an increase in water potential, while a decrease in external pressure will result in a decrease in water potential.
- **Concentration of Solute**: This is also referred to as the amount of solute present in the solution. An increase in the concentration of solute (more solute added) will decrease the water potential, while a decrease in solute concentration will increase the water potential. This relationship is inversely proportional.

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