Chester talks to his grandma on the phone and she asks what birthday presents he received. chester picks up a stuffed dog and says, "i got this! " fully expecting his grandma on the other end of the phone to see the dog, too. what aspect of development is chester showing? concrete operations egocentrism abstract thinking sensory motor skills

This chart shows the number of soldiers killed according to two different sources. source a is a book written by university professors. source b is from a well-known historical website. in a paragraph, explain why the data presented is different, and evaluate the reliability of each source. which should be used in a school research project, and why?

Refers to the biological heritage people use to identify themselves.

True or false? correlations can only be negative.