Here's why:
* The transition from hunter-gatherer to settled agriculture: The Neolithic period saw a significant shift in human lifestyles. People transitioned from nomadic hunter-gatherer societies to settled agricultural ones, with the domestication of plants playing a key role.
* Early evidence of plant cultivation: Archaeological evidence from this period indicates the cultivation of crops like wheat, barley, and legumes. This suggests a deliberate effort to control plant growth and ensure food security.
* The development of tools and techniques: The development of tools like sickles and grindstones, along with early irrigation systems, further supports the notion of deliberate cultivation.
However, it's important to note:
* Early horticulture was likely gradual: It wasn't a sudden shift, but a gradual process of observation, experimentation, and adaptation.
* Different regions developed horticulture at different times: While the Near East saw early developments, other areas like the Americas and Asia developed horticulture independently.
Therefore, while the Neolithic period is generally considered the beginning of horticulture, it's a complex process with a long and varied history.