How has our society been developing

Our society has been devel by creating new things

Explanation:

Modern humans evolved roughly 200,000 years ago and began spreading across the world. Across time, various groups developed their own ways of doing things, like creating their own cultures, or sets of productions, beliefs, and behaviors.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.