Answer:
I am all around you but you cannot see me. I have no throat but you can hear me. Valued during summer but despised in the winter.
I am a rock group with four members. All dead one was assassinated.
I am the noise Santa's reindeers make
I see what you see feel what you feel and hear what you hear. I know all of your moves before you make them. I even know the moves you didn't make.
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 will disappear every time you say my name.