Final answer:
Breastfeeding is an example of positive feedback where more suckling leads to increased milk production.
Step-by-step explanation:
The more a baby suckles his mother's breast to obtain milk, the more milk is produced.
This is an example of positive feedback. When the baby suckles, it stimulates the release of the hormone oxytocin, which causes the flow of milk.
The release of milk then stimulates the baby to continue sucking, creating a positive feedback loop that maintains milk production as long as the baby continues to breastfeed.