The answer is B i believe
Scientific investigations on Sudbury's soil revealed the decrease
in soil pH was correlated with increased copper and nickel levels.
Answer:
Symbiosis and metabolic cooperation.
Explanation:
Symbiosis is a term called for bacteria that live in symbiosis with another organism or with each other, as we can see here there is a tow bacteria living in the same place (gut), one attached to the surface of the gut and another one synthesize ATP which can be used by other bacteria which made both of them benefits from a metabolic reaction that made by one bacteria.
Stars emit visible light.
