Give the biological/technical terms for the following:
A constituent that causes pollution.

Explanation

**Step-by-Step Solution:**

1. **Understanding Pollution**: Begin by defining what pollution is. Pollution occurs when the natural composition of a substance or environment is altered or contaminated by the presence of another substance.

2. **Identifying the Constituent**: The question asks for a term that describes a constituent that causes pollution. This means we are looking for a term that encapsulates any substance that leads to pollution.

3. **Defining the Term**: The term that describes a constituent causing pollution is "pollutant." A pollutant is any substance that, when introduced into an environment (like air, water, or soil), causes harm or adverse effects.

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