WILL GIVE BRAINLIEST- <3 What is most likely the author’s purpose for writing this article?

to explain how to classify living things
to explain the production of food and how life uses energy
to explain the importance of flies and maggots
to explain past experiments that disproved spontaneous generation

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.