Biotic and abiotic parts of an ecosystem can actually become limiting factors for a population. Which of the following are BIOTIC limiting factors? Sunlight availability for growth of plants
Not enough grass for deer to eat
Drought on the Savannah of Africa
Flooding due a storm surge along coastal areas.

your picture is not part of the scientific method.

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .