Answer:
By myself, I'm practically nothing. Worthless as a leader, but when I follow a group, their strength increases tenfold. What am I?
What kind of dog keeps the best time?
I am a word of letters three. Add two and fewer there will be. What word am I?
I am easy to see, but no one likes looking at me. Without me, there would be no you. What am I?
I go around and in the house but never touches the house
What grows bigger the more you contract it?