Respuesta :
Answer:
Explanation:
Options are:
A) saliva
B) mucus
C) bacteria
D) toothpaste
E) food particles
So, bacteria, food particles and saliva are the three materials that form plaque.
Plaque refers to a sticky and hard film that forms on the teeth surface, they can be felt by the tongue. It's like a small bulge, colorless. This plaque is formed when we don't brush teeth often, when that happens, bacteria remains on the teeth, and also food particles which contain carbohydrates and sugar. So, these bacterias produce acids which degrade the enamel of the teeth, causing, in long periods, tooth fall.
