Question

how supply creats its own demand?

Answer 1

supply creates its demand as the supply is according to demand less demand less supply more demand

Answer 2

Say's Law stipulates that, since supply creates its own demand, overproduction—the creation of goods and services without an equal flow ofdemand for those goods and services—is impossible. ... In that sense, thesupply of a farmer's crops constitutes his ability to demand an automaker's automobile