Final answer:
The Neolithic Revolution marked a shift from hunting and gathering to agriculture, driven by warmer post-Ice Age temperatures and the appeal of a secure food supply that supported larger populations and led to the establishment of permanent communities.
Step-by-step explanation:
Neolithic people began growing crops due to a transformative period in human history known as the Neolithic Revolution. Around twelve thousand years ago, concurrent with the end of the last Ice Age when temperatures began to rise, human populations made the monumental shift from nomadic hunting and gathering to stationary agriculture. This transition allowed for more consistent and reliable food supplies, supporting population growth and leading to the development of permanent settlements and ultimately civilizations. Early agriculture with simple tools evolved as humans began to actively promote the growth of plants and the domestication of animals, enabling them to stay in one place without the need for continual migration in search of food sources.