Climax, I believe. I would describe it as where all the “action” happens before the resolution.
Answer:
Precambrian - the first era
Paleozoic - when life first flourished on Earth
Mezozoic - the era before the current one
Cenozoic - the current era
Explanation:
The biggest part in Earth's geological history comprises of Precambrian era. It lasted from the formation of earth all the way untill Cambrium, which marked the beginning of Paleozoic. It's main characteristic is the rich sea, plant and insect life. After Paleozoic, Mezozoic ensued and the dinosaurs marked this period. After their extinction, Cenozoic started, era that still lasts.
There is no story for this, please add one and I will give you an answer int he comments.
Without innovation in food production, the factories could not have grown so fast.
This is the answer because this fact is mentioned several times in the article.