Answer the following question given this paragraph: 

Some bacteria depend on a host organism for energy and nutrients. These bacteria are known as parasites . If the host starts attacking the parasitic bacteria, the bacteria release a layer of slime that surrounds the cell wall. This slime offers an extra layer of protection.


Q: When a host attacks a parasitic bacteria, the bacteria release what to surround the cell wall?

 Choices:

- bacteriophages

- pathogens

- protoplasma

- layer of slime

A:
layer of slime
