Name the instrument used to measure the rainfall at a place.

Explanation

**Step-by-Step Solution:**

1. **Understanding Rainfall Measurement**: Rainfall, also known as precipitation, is the amount of water that falls to the ground in the form of rain. It is important to measure this to understand the climate and weather patterns of a region.

2. **Identifying the Instrument**: The instrument specifically designed to measure the amount of rainfall at a place is called a rain gauge.

3. **Function of a Rain Gauge**: A rain gauge collects rainwater over a specific period, allowing meteorologists and hydrologists to determine how much rain has fallen in that time frame.

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