<span>These senses may be exhibited as early as around the 6th month. When shown two shapes, one of which was considered the "helper" and one a "hinderer," the infant showed a willingness to spend more time playing with the "helper" shape than the "hinderer."</span>
Answer:
A - acid
When the pH of something goes over 7, it is considered a acidic substance, because it is not safe/authorized for any humans to drink it. Also, you ca not drink something below the pH of 6 because it is an alkaline, which is also not safe to drink.
The answer is: "zero-tolerance policing" .
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Answer:
There was a local water supply for drinking, washing, cooking and transport. dry land, so that people could build on areas that don't flood. a defendable site, eg a hilltop or river bend, to protect from attackers. good farm land with fertile soils, so people could grow crops.
Explanation:
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