Contacts between sedentary and nomad peoples<span> resulted in trade, tribute payments</span>
The Amazon river flows through Peru, Bolivia, Columbia, Venezuela, Ecuador, and Brazil in South America
The growth of los angeles increses the amount of pollution/runoff into the owens river vally
Coastal plains and Interior plains is in elevation. Coastal plains have low elevation and low relief. Interior plains have varied elevation and low relief. Coastal plains also lie along the shore while Interior plains are surrounded by other hopefully this helps
D. Olduvai Gorge
Explanation:
- From 1935 to 1959, Louis and Mary worked hard in several excavations in Kenya and Tanzania, looking for the remains of early humans. Although they encountered many difficulties, both because of the dangerous and inaccessible terrain and the scarce postwar scientific foundations.
- However, the real breakthrough came in 1959, when one morning in the Olduvai Gorge - a region separating the famous National Park from Tanzania's more famous Serengeti National Park - Mary discovered a 1.75 million-year-old hominid skull, later classified as Parantropus boisei.
- This finding was a strong argument that hominids evolved in Africa.
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