Rebecca is the youngest child in her family with four older brothers. rebecca has a female friend over and wants to drive remote-controlled cars. rebecca's friend says, "girls don't play with cars! i don't want to play with cars. i want to play with dolls." from then on, rebecca will play only with dolls. this is an example of:

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