When a newborn baby nurses, the mother’s body is stimulated to produce milk. what would happen to the milk supply if the mother chose to bottle feed rather than breast feed? why?

it would dry up

Explanation: simiply because she is not breast feeding anymore

The breast will be stop producing milk.

Explanation:

Breast milk production is a supply and demand process, the breasts will eventually stop making milk, and the milk already in your breasts will dry up once there is no longer nursing, pumping, or hand expressing.

For women who don't breastfeed at all, their body begins to secrete prolactin inhibiting factor (PIF) which gradually shuts down milk production

Engorgement, or when your breasts are painfully overfull with milk, can happen if you're producing breast milk, but the baby is drinking infant formula.