Answer:
If you have me you want to share me. If you share me you don't have me. What am I?
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
Wind and cord combine, buzzing in the box. In all this we find, though to some the use is lost. What am I?
I save lives on the ground and in the air. What am I?
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.