ASAP PLEASE ANSWER ALL PAGES

FIRST PAGE

1. Africa’s land and its many climates.

2. Salt was one of those materials and it helped people from spoiling there food and people needed it in their diet to survive Africa's hot climate. (potatoblur said this on for the same question)

3. I don’t know, family and age sets maybe

4. Iron blades allowed people to cut down trees and clear land for farms, this caused the population to grow. Also, a new gardening tool was made from iron.

5. interdependence on each other to share in the work of building, harvesting, and raising families.

SECOND PAGE

3.To ensure the king was richer than his subjects.

5. Overgrazing left the soil exposed to hot desert winds, making it worthless for farmers.

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.

are there any options?