The answer is all of the above.
Answer:
1. old age social security
2. Availability of natural resources
3. Water supply , sustainable growth of crops
Yes that way other scientists can test there findings or it could help someone.
Answer:
By continuing to shuffle the contents around and change the ocean basins in the longer term. In the shorter term, volcanic eruptions and earthquakes will continue.
Explanation:
Plate tectonics moves the continents around on a scale of 100s of millions of year. Plates move at about the same rate as your finger nails grow, so its pretty slow. See the attached pic of what the world might look like 250 million years in the future.
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