Answer:
A sport with love and service played by singles and pairs.
The higher I climb, the hotter I engage. I cannot escape my crystal cage. What am I?
I fill a room but take no space. What am I?
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
I wonβt break if you throw me off from the highest building but I will break if you place me in the ocean.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.