AFCAT II 26 AUG 2022 Shift 1 Paper

After arranging all the letters in a meaningful word:
1) REABTH ⇒ BREATH
2) YALP ⇒ PLAY
3) GINS ⇒ SING
4) TEIRW ⇒ WRITE
"BREATH" is an involuntary activity and others are voluntary activity.