Answer:
I am long and slim works in light. Has but one eye and an awful bite.
I have a name that's not mine and no one cares about me in their prime. People cry at my sight and lie by me all day and night.
I am gentle enough to soothe your skin, light enough to fly in the sky, strong enough to crack rocks. What am I?
My days are numbered.
I begin and have no end and I end all that begins. What am I?
Give it food and it will live, give it water and it will die.