What is life span?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Life Span**: Life span refers to the duration of time that an organism or an object exists or functions. It indicates the period from the beginning of life until death or the end of functionality.

2. **Biotic vs. Abiotic**: Life span can be applied to both living organisms (biotic) and non-living items (abiotic). For living organisms, it refers to the time from birth to death, while for non-living items, it refers to the time they remain functional or usable.

3. **Example of Biotic Life Span**: Taking humans as an example, the life span of a human is the time from birth until death. This period represents the entire duration of life.

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