Answer:
I am a cave full of bones and the house of a worm.
I am a house with two occupants sometimes one rarely three. Break the walls eat the boarders then throw away me.
Wind and cord combine, buzzing in the box. In all this we find, though to some the use is lost. What am I?
I am a busy worker who is a water mammal.
My first is a heir; My second's a snare; my whole is the offspring of fancy; which I sent out of play upon Valentine's day As a token of love to my Nancy.
Give it food and it will live, give it water and it will die.