Symbiosis relationship coli and human

The relationship between E.coli and human is a parasitism  that is "symbiotic relationship"(a kind of parasitism ) .

Explanation:

Parasitism

It  refers to the" relation in which one organism lives in or on the body of other organism to fulfill its nutritional requirement" .

The one who lives is parasite and other on whom it lives is Host .

In other words we can say ,that parasite gets an advantage and Host faces a kind of harm .

For example : Lice is an parasite and is often  present in human head where it harms human by sucking blood .

But ,this is not true in all cases.

For example :  in case of E.coli bacteria and human .

This bacteria lives in the intestine of humans but in this case both humans and bacteria is benefited.  This parasitic  relationship changes to symbiosis that is where both the partners are mutually benefited .

Like in this case, bacteria help humans by producing certain vitamins that are essential for humans and in return it gets nutrition and place to live inside the human's body .

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a

easy

explanation: