Answer: c) Unprecedented rise in the human population
Step-by-step explanation:
The Agricultural Revolution (first one) occurred during the Neolithic period some 12,000 years ago and is viewed as the main reason for the explosive growth of the human population since then.
Before the Agricultural revolution, humans relied on hunting and gathering as their primary means of sustenance and this strategy whilst providing more nutrients due to the variety of food found, could not support a large population.
With the Agricultural revolution, may cultures began to engage in agriculture which enabled them to have a more stable source of food that was able to support more humans. As a result, people settled down and founded families in societies and this led to an unprecedented rise in human population.