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; the best answer is (demand);

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.