How did agriculture figure in Colin Renfrew’s Anatolian homeland hypothesis?

In the Anatolian homeland hypothesis, archaeologist Colin Renfrew proposes that the Proto-Indo-European language originated in Neolithic Anatolia around the 7th millennium BCE.12

Renfrew argues that the expansion of these languages was intrinsically linked to the spread of agriculture into Europe. According to this model, the Indo-European language family moved across the continent alongside the "Neolithic package"—the set of farming practices, crops, and technologies that defined the transition to sedentary agricultural life. In this view, the demographic growth and migration associated with the adoption of early farming were the primary drivers that carried the ancestral language from its Anatolian source into new regions.12