Question

=which form of yoga is based on the principle of controlled breathing ??​

Answer 1

Pranayama - (From Hatha Yoga and Ashtanga yoga)

"Pranayama is control of Breath". "Prana" is Breath or vital energy in the body. On subtle levels prana represents the pranic energy responsible for life or life force, and "ayama" means control. So Pranayama is "Control of Breath