PLEASE HELP ME IM ON MY LAST ATTEMPT I WILL MARK BRAINLEIST

this goes from question on top as One

Explanation:

Top is "introduction of an antibiotic"

bottom is " a population resistant to antibiotic"

the second one is "a toxic agent"

the third is "bacteria"

fourth is "most of bacteria died"

not sure if this is what you'r looking for nnew= nold

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.