Question

Please answer this question

Answer 1

Answer:

4

Explanation:

Air flows from higher pressure to the lower pressure.

During T1, pressure in the lungs is less than 760(atm. pressure). Pressure outside is greater than pressure inside the lungs. So, air is flowing from outside to inside i.e.,inspiration is happening. And we know that during inspiration, ribcage does move upwards and outwards.

Therefore, 4.