Write any three characteristics of a good fuel.

Explanation

### Step-by-Step Text Solution:

1. **Definition of Good Fuel**: A good fuel is defined as a substance that can produce a significant amount of energy when burned, and it possesses certain desirable characteristics that make it efficient and safe for use.

2. **Characteristic 1 - Proper Ignition Temperature**:
- A good fuel should have an optimal ignition temperature. This is the minimum temperature at which the fuel starts to combust.
- If the ignition temperature is too low, the fuel may ignite spontaneously, which can be dangerous. Conversely, if it is too high, it may be difficult to ignite, making it less practical for use.

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