Answer:
In my life I must bare my bloodline I must share.
Iām tall when Iām young. Iām short when Iām old. I can light up your world. What am I?
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
When set loose I fly away. Never so cursed as when I go astray.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.