Why is cell called as the basic unit of life?

Explanation

**Step-by-Step Solution:**

1. **Definition of a Cell**: A cell is the smallest structural and functional unit of an organism. It is often referred to as the building block of life.

2. **Composition of Living Organisms**: All living organisms, whether unicellular (like bacteria) or multicellular (like plants and animals), are made up of cells. This indicates that cells are fundamental to the structure of all living things.

3. **Functions of Cells**: Cells perform essential activities necessary for life. They carry out metabolic processes, which include energy production, growth, and reproduction. These activities are vital for maintaining the organism's life.

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