With the ability to forge iron tools, farming tools were more effective and provided a greater production and effectiveness. More food produced means that more people are able to be fed and consequently establish and work in the land. With a higher population and food cap, West Africa settlements were able to grow.
Answer:
Pretty sure its A
Explanation:
This practice has since been stopped, because it is unhealthy, and causes blood clots sometimes
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Earth's mass has remained constant, and thus the gravitational pull at the surface has decreased over time; Earth's mass has grown with the volume in such a way that the surface gravity has remained constant; Earth's gravity at its surface has increased over time, in line with its hypothesized growing mass and volume.
Austria used it as a flimsy excuse to start a war with Serbia, which it had been wanting to do anyway.
Leaving the safety of their trenches and attacking the enemy.