Please help as soon as possible

Which of the following group roles has the responsibility of keeping the discussion on schedule?

It's to know your purpose before you read something because a purpose can:

Read the excerpt from "the blackfeet creation." how do readers know that this excerpt is from a myth? the excerpt describes an animal called a muskrat. the excerpt describes old man drying the mud. the excerpt describes old man scattering mud over water. the excerpt describes how muskrat create land.