Researchers hypothesized that mirror neurons provide a basic mechanism for simple allowing researchers to directly examine the mechanisms better.

Mirror neurons play an important role in learning motor tasks involving hand eye coordination, and acquisition of language skills. Based from the observation of researchers, mirror neurons has introduced a basic mechanism for simple imitation, allowing them to directly examine the mechanism for both learning and empathizing in social situations of humans and animals.

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.

the scientific method.