A. Virus - flu
B. Fungus - yeast infection
C. Protist - malaria
Answer: A frequently used word or phrase or it is a way to convey your thoughts, feelings or emotions.
Example: "a penny saved is a penny earned."
True, it's done by the Digestive system
It can affect the environment because it could absorb into the ground and contaminate the groundwater, then this could runoff into a pond, river, lake, etc., which would then contaminate that water source. This also negatively impacts wildlife because they rely on these water sources to drink water, bathe, and/or catch food (ex: a bear catching a fish in a river).