Answer:
I transfer oxygen from the atmosphere to your blood
I am an instrument that you can hear but cannot see or touch. What am I?
I am what one cannot keep, two cannot hold, and three cannot destroy. What am I?
You throw me out when you want to use me, but take me in when you donβt want to use me. What am I?
A necessity to some, a treasure to many, I'm best enjoyed among pleasant company. Some like me hot, some like me cold. Some prefer mild, some like me bold. What am I?
Written on with words of white, Has the color of the night, Is the teacher's best delight, And a student's daily fright