Why do the Ama divers not use oxygen thanks or other breathing equipments for diving? (Read the text and answer the question)

The Ama divers are amazing because they can dive to the deep sea without using oxygen tanks or other breathing equipments.

Ama divers can go down in up to 25 metres into the sea.

The Ama divers use their own breathing techniques in diving.

Yes, I think the Ama divers possess some extra-ordinary qualities. Among them, holding breath for upto two minutes, careful watching, hunter instincts and their lungs capacity are worth mentioning.

The Ama divers dive into the sea depending on their own skills and breathing techniques.

The Ama divers live in some fishing villages along the sea coast of Japan.