Answer:
When I come in from sea to shore twenty paces you'll see No less no more.
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
I am a seed with three letters in my name. Take away the last two and I still sound the same. What am I?
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot. All is cool where it is not. What is it?
I am a busy worker who is a water mammal.
When is it bad luck to see a black cat?