Those tools that had been preserved, of course, are the stone tools. Paleoindian stone tools were generally made from workable stones like chert, quartzite, or obsidian, and Paleoindians seem to have been very picky about only using the best materials for their tools.
I got this from here ⇒ Paleo Indians: Culture, Artifacts & Tools | Study.com
Hope this helps you! =^-^=
Reagan Apologized to Thatcher for Grenada Invasion. ... In October 1983, Reagan ordered U.S. troops to invade Grenada, a Caribbean island nation, after he determined that its turbulent Marxist government posed a threat to the almost 1,000 Americans on the island (many of whom were students at a medical school).
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Answer: B. Improving Agricultural techniques with Irrigation and fast rising rice increased food supplies.
Explanation:
The Song Dynasty of China which lasted from 960 - 1279 AD saw a great increase in population as well as income. This was due to improvements in Agriculture that led to increased food supplies which could support a larger population.
Some of these improvements included irrigation as more farming commenced on the Yangzi River which increased crop yields as well as the introduction of different types of rice such as fast rising rice which meant that more rice could be grown in planting season.
People who live in the authoritarian system do not have an effective way to restrain the power of the rulers
