What is the key to establishing criterion validity?

Why might a reader look for an idea that is restated? to craft a summary of the article to find the subheadings in the article to identify the article's main idea to locate the article's key support

Was chris mccandless a hero why or why not

In free the children why does the author provide a first-hand account of visiting a brick kiln? to emphasize how factory conditions have improvedto show a group of people wno iqbal escapeto emphasize the homic conditions of debt slaveryto show the place where iqbal was forced to work