Bacteria will become part of a biofilm because select one: a. it allows them to be phagocytosed easier. b. it allows all compounds in the environment to diffuse to the organism's location much faster. c. it allows them to live separated from other bacteria. d. it allows them to remain in a favorable niche.

The correct answer is option D.

Explanation:

Biofilms are a aggregation of one or more than one type of micro organisms such as bacteria that can be found growing on various surfaces.

Other than bacteria, there other micro organisms like fungi and protists also form biofilms. Biofilm is a combinedly packed community of the bacterial population that allows them  to live in favourable condition.

thus, the correct answer is - option D.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate