Final answer:
Pi acquired bait for fishing by buying the fish caught in a net and releasing them back into the sea.
Step-by-step explanation:
Pi, a student of Pythagoras, acquired bait for fishing by buying the fish caught in a net and releasing them back into the sea. This event is recorded near Metapontum, on the shores of Italy, where Pi noticed the fishermen drawing up their net. He purchased the fish and set them free, showing his compassion for the creatures and his belief in non-violence. This act highlights Pi's respect for life and his principles as a philosopher.