State which of the following sets are finite sets or infinite. In case of finite set,

Explanation

To determine whether the given sets are finite or infinite, we will analyze each set based on the definitions of finite and infinite sets. A finite set has a countable number of elements, while an infinite set has an uncountable number of elements or extends indefinitely.

### Step-by-Step Solution:

1. **Set of all natural numbers**:
- Natural numbers are defined as {1, 2, 3, 4, ...}.
- This set continues indefinitely without an upper limit.
- **Conclusion**: This set is **infinite**.
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