Which statement best describes a part of the nitrogen cycle?
animals absorb nitrogen from the air they breathe and incorporate it into their tissues.
certain bacteria living in the roots of plants convert nitrogen to a form plants can use, and animals obtain their nitrogen by eating those plants.
certain bacteria convert nitrogen to a form animals can use, and animals obtain their nitrogen by inhaling this nitrogen.

Option B

Explanation:

The best part of the nitrogen cycle is that it assures that nitrogen is made available to the plants and animals present in the environment.

There are certain nitrogen fixing bacteria present in the soil (roots of the plant) that converts the nitrogen into the form by which it can be utilized by the plants.

This nitrogen present in the plants is consumed by the animals and this is how the animals obtain nitrogen.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: