Answer:
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.
I am a delicious way of representing data.
It rows quickly with four oars but never comes out from under its own roof. What is it?
I sit in a corner while traveling around the world. What am I?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk