What process describes the transfer of heat through matter by molecular activity?
conduction
convection
radiation
evaporation

Option (a) is the correct answer.

Explanation:

Conduction is defined as the process in which there is transfer of heat through the material of substance due to the difference in temperature of adjoining regions.

For example, cooking omelet in a pan is a conduction process.  

Thus, we can conclude that out of the given options conduction is the process which describes the transfer of heat through matter by molecular activity.

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation:

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.