Of all other elements on the periodic table some are critical what name represents those others and what function do they serve for humans?

They are called  Trace elements

they function as catalysts for enzymatic reactions

in some oxidation-reduction reactions (Cu) for some metabolic reactions to for ATPs synthesis,and

also as oxygen carrying elements in Hb and myoglobin muscles e,g(Fe)

Explanation:

Basically Trace elements are group of minerals in small quantity in living organisms.Their  functions may be important or essential to the organisms,or needed in small amounts non essentials.

Example of these elements are Fe,Zn,Se,Cu,I,Mn Mb. etc

They are also involved in prevention of some diseases .Generally when they are consumed in large amounts they are toxic to living cells.

others like aluminum, cadmium, mercury lead may beneficial  to living organisms,but there role has not yet be verified.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

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