Answer:
Give it food and it will live, give it water and it will die.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
It is more feared than fear itself, And no one can escape it. It takes no sides and does not judge, it does not know to hold a grudge. It is the most clearest result, Of how life beats you by default.
What can be measured but not seen?
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
When is it bad luck to see a black cat?