What is the utility of tissues in multi-cellular organisms?

Explanation

### Step-by-Step Solution:

1. **Understanding Unicellular Organisms**:
- Unicellular organisms consist of a single cell that performs all necessary life functions such as respiration, digestion, and movement.
- This means that one cell is responsible for all activities, leading to a high workload on that single cell.

2. **Limitations of Unicellular Organisms**:
- The lack of specialization in unicellular organisms results in inefficiency.
...