According to the (1) , there is a fixed amount of nitrogen on Earth. Nitrogen that exists in the air is fixed by (2) in root nodules. This allows it to exist in the soil. (3). then use the nitrogen to make proteins and other complex compounds. When animals eat the plants, the nitrogen is then transferred to their bodies. When these organisms die, the nitrogen is broken down by (4) and returned to the air by bacteria. (1) Law of Conservation of Mass
Law of Conservation of Energy

(2) plant
bacteria
fungi

(3) animal
plant
bacteria

(4) fungi
animal
plant

these are the choices thank you

a,b,b,a

Explanation:

nitrogen is an example of mass

hello, never fear the humanspider is here!

answer: this is what i could find because i never done this work before.

it's likely the answer would be c.

- a - you could speak slowly, but if you used the same humor and a higher complexity or the same level of complexity, they might understand what to do.

- b - the humor presented might not be understandable to the 1st graders.

- d - explaining where peanut butter comes from is irrelevant to the homeeco class.

**c - by adjusting the level of complexity, you are going to a point of talking where everybody understands you, if you what i'm saying.**

note: if you loved this answer click that cool mark brainliest button buddy!

~

your friendly neighborhood human spider.

ieoiw what en the: enswer is b