Which characteristics define a liquid?

Definite volume, variable shape, and high molecular motion.

The characteristics that define a liquid are as follows-

Liquid is one of the four basic states of matter having fixed volume that is independent of pressure.

It is an incompressible fluid with indefinite shape (as it occupies the shape of container in which it is poured).

The molecules in a liquid have space between them, so they are in mobile state always.

Example- The most common liquid is water.

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.