There are other bacteria that use the ammonium in the water as a nitrogen source and take it up to make organic nitrogen and new bacteria. When they do this and hold the nitrogen inside bacterial cells, it is called

the answer would be b

explanation:

i thinking chemical change

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

b) the inside picture would look at a very high temperature in a very low ph