Mary often plays the game peek-a-boo with her baby. Initially, Mary covers her baby and then removes the cover, registering "surprise" at the baby's reappearance. After a time, her baby does the covering and uncovering. This is an example of ___.

How does the principle of federalism affect the u.s. government? a. it guarantees that the united states will always be a representative democracy b. it ensures that the state governments have greater authority that the federal government c. it creates both separate and overlapping powers for the federal and state governments d.it divides the federal and state governments into three branches

1. describe at least 3 similarities or differences between homo habilis and australopithecus 2. describe at least 3 similarities or differences between cro-magnon and neanderthals.

The signing of which document ended the american revolutionary war? a. u.s. constitution b. declaration of independence c. treaty of paris d. treaty of versailles