Anne Frank's diary describing her life during WWII is it primary or secondary

What was the main purpose of one of the first world organizations

The development of simple stone tools by early hominids led to the ability to procure meat more efficiently. this in turn led to the change in diet that included larger amounts of protein. many scholars believe that this shift in diet was a significant part of how our ancient ancestors adapted so quickly to a varied set of environments, and thus were able to begin cultural development. this demonstrates the intimate connection between

Can someone me with these 2 questions? and tell me why it is the correct answer?