Give reason, why RNA viruses are the most mutable and evolve faster than other viruses.

Explanation

### Step-by-Step Solution:

1. **Understanding RNA Viruses**: RNA viruses are viruses that have RNA as their genetic material. Unlike DNA viruses, they replicate their genetic material using RNA polymerase.

2. **Proofreading Mechanism**: In DNA replication, the enzyme responsible for copying the DNA is called DNA polymerase. This enzyme has a proofreading ability, which means it can check and correct errors that occur during the replication process. This proofreading ability significantly reduces the mutation rate in DNA viruses.

3. **Lack of Proofreading in RNA Viruses**: RNA viruses, on the other hand, use RNA polymerase for replication. However, RNA polymerase does not possess a proofreading mechanism. This means that when RNA viruses replicate, they are more prone to errors, leading to mutations.

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