Step 1: Read the clue:
The blank describes an activity that has a series of postures and also breathing exercises. It is used to control both body and mind.
Step 2: Match the clue to Yoga:
Yoga joins body postures (asanas) with controlled breathing (pranayama). Regular practice calms the mind and keeps the body fit. It is a common way to manage stress. So (B) fits.
Step 3: Why the other options are wrong:
Meditation trains the mind to focus. It does not need a series of postures, so (A) is wrong.
Physical exercise builds strength and stamina, but it is not built around breathing control, so (C) is wrong.
Sleeping is rest for the body. It has no postures or breathing practice, so (D) is wrong.
Final Answer:
Yoga includes postures and breathing exercises to control body and mind. This is option (B).