What are conserved quantities?

Explanation

**Step-by-Step Solution:**

1. **Definition of Conserved Quantities**: Conserved quantities are physical quantities that remain constant throughout a process. This means that the total amount of the quantity does not change from the beginning to the end of the process.

2. **Examples of Conserved Quantities**:
- **Charge**: In any interaction between charged particles, such as attraction or repulsion, the total charge remains constant. For instance, if you have a positive charge (+q) and a negative charge (-q) interacting, the sum of the charges before and after the interaction will always equal zero.
- **Energy**: Energy is another example of a conserved quantity. In a closed system, the total energy remains constant, even though it may change forms (e.g., from kinetic to potential energy).

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