Why is a capsule advantageous to a bacterium?

1. It protects the bacterium from dessication
2. It provides means for locomotion
3. It allows bacterium to hide from host’s immune system
4. It allows the bacterium to attach to the surface

Do explain your answer.

The cell capsule is a very large structure of some prokaryotic cells, such as bacterial cells. It is a polysaccharide layer that lies outside the cell envelope of bacteria, and is thus deemed part of the outer envelope of a bacterial cell.

with the help of these capsule bacteria do hides from the immnue system of the host , so, that the immnue system of host cannot affect it . 

so, from your options option no 3 is correct

Dear student 

The capsule is considered a virulence factor because it enhances the ability of bacteria to cause disease (e.g. prevents phagocytosis). The capsule can protect cells from engulfment by eukaryotic cells, such as macrophages

Hope this helps 

Dear student 

The capsule is considered a virulence factor because it enhances the ability of bacteria to cause disease (e.g. prevents phagocytosis). The capsule can protect cells from engulfment by eukaryotic cells, such as macrophages.
Capsules also contain water which protects the bacteria against desiccation

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