What is a biofilm?
a. A group of bacteria that accumulate in layers and secrete a protective extracellular material
b. A layer of sugars that persist even after bacteria have been killed by antibiotics
b. Free-floating bacteria that move through the blood to other sites
c. A bacterial cell that secretes an extensive network of fibers around its cell wall

A group of bacteria that accumulate in layers and secrete a protective extracellular material. (Option A)

Explanation:

Biofilm is defined as one or more types of microorganisms collectively grow in different places. Organisms that form the biofilm include protests, fungi, and bacteria.

Dental plaque is an example of a biofilm. It is a known buildup of slimy bacteria that forms on the teeth surface. Biofilm can grow on different surfaces such as animal tissues, plant tissues, minerals, metal, etc.

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explanation:

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where is the diagram?

if you insert the diagram ill be able to you