Is the transfer of thermal energy by the movement of heated material from one place to another.

conduction
convection
radiation
absorption

Conduction

Explanation:

Transfer of heat by movement of heated material indicates that the material is touching something, and therefore can transfer heat.  If materials touching conducts heat, then it is conduction.

its 42

i say its d?

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.