Here's why:

* Structural Support: The cell wall provides rigidity and shape to the fungal cell, protecting it from internal pressure and external stress.

* Composition: Fungal cell walls are primarily composed of chitin, a strong and flexible polysaccharide, along with other components like glucans and proteins. This composition differs from plant cell walls, which are mainly made of cellulose.

So, the presence of a cell wall is a defining characteristic of fungi, helping them maintain their structure and function.