Answer:
symbiotic association
Step-by-step explanation:
The simbiosis can be:
Mutualist: Mutualism is defined as a symbiotic relationship in which organisms are of different species provided benefits to each other.Mutualism between bacterias and animals is very important for example in their digestive system In herbivores, bacteria are the ones that digest the plant cell wall.
Another example is In the large intestine humane, the E.coli bacteria synthesizes vitamins. The large intestine in turn provides it nutrients
Commensalism: one species benefits and the other neither benefits nor harms. For example, the micobacterias that inhabit the human ear, they live from secretions and cause no harm to human guests
Parasitic: like the many bacteria that cause diseases