Given examples of four spontaneous process you observe in nature

Explanation

### Step-by-Step Text Solution:

1. **Understanding Spontaneous Processes**:
- A spontaneous process is one that occurs naturally without needing to be driven by an external force. These processes have a natural tendency to happen on their own due to the laws of thermodynamics.

2. **Example 1: Combustion of Fuel**:
- The burning of fuel, such as wood or gasoline, is a spontaneous process. Once ignited, the fuel reacts with oxygen in the air, releasing energy in the form of heat and light. This reaction continues until the fuel is consumed.

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