Answer:
I am a shiny metal sheet that covers BBQ food.
I know a word of letters three. Add two and fewer there will be. What is the word?
By myself, I'm practically nothing. Worthless as a leader, but when I follow a group, their strength increases tenfold. What am I?
Six letters it contains. Take away the last and only twelve remains. What is the word?
I march before armies a thousand salute me. My fall can bring victory but no one would shoot me. The wind is my lover one-legged am I. Name me and see me at home in the sky.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.