How do you figure out the main idea of a nonfiction passage

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.

Write four sentences that incorporate ‘imagery’ (all of your senses) to describe a place that you like to visit.

To protect consumers, the sec requires brokers and dealers to what? information about securities.