Which of the following is a good tip for documentary photography?

shoot with your heart.
do whatever you must to get the image.
never worry about how people will feel about an image.
avoid using black and white photos for documentary images.

I am pretty sure that the following which is a good tip for documentary photography is the second option : Avoid using black and white photos for documentary images. I think it's right because when you capture moments for such kind of photography you have to convey what is happening around you as accurately as possible.

Ithink they was worshiped because they have big head and people worship who the biggest and have power that why

Depends on which book your talking about or movie.