Adivina adivinanza

¿A ver si sois capaces de resolver estas adivinanzas?

What has roots as nobody sees,Is taller than trees,Up, up it goes,And yet never grows?
Answer: mountain


Thirty white horses on a red hill,First they champ,Then they stamp,Then they stand still.
Answer: teeth


Voiceless it cries,Wingless it flutters,Toothless bites,Mouthless mutters.
Answer: wind


It cannot be seen, cannot be felt,Cannot be heard, cannot be smelt.It lies behind stars and under hills,And empty holes it fills.It comes first and follows after,Ends life, kills laughter.
Answer: darkness


A box without hinges, key, or lid,Yet golden treasure inside is hid.
Answer: egg


Alive without breath,As cold as death;Never thirsty, ever drinking,All in mail never clinking.
Answer: fish


This thing all things devours:Birds, beast, trees, flowers;Gnaws iron, bites steel;Grinds hard stones to meal;Slays king, ruins town,And beats high mountain down.
Answer: time


You feel it, but never see it and never will.
Answer: heart


You must keep it after giving it.
Answer: your word


As light as a feather, but you can't hold it for ten minutes.
Answer: your breath


Has a mouth but does not speak, has a bed but never sleeps.
Answer: river


Runs smoother than any rhyme, loves to fall but cannot climb!
Answer: water


You break it even if you name it!
Answer: silence


You feed it, it lives, you give it something to drink, it dies.
Answer: fire


A red drum which soundsWithout being touched,And grows silent,When it is touched.
Answer: heart


Two horses, swiftest travelling,Harnessed in a pair, andGrazing ever in placesDistant from them.
Answer: eyes


A harvest sown and reaped on the same dayIn an unplowed field,Which increases without growing,Remains whole though it is eatenWithin and without,Is useless and yetThe staple of nations.
Answer: war