Answer:Argon is the third noble gas, in period 8, and it makes up about 1% of the Earth's atmosphere.
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<span>D. fossils
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It's A, a limiting factor is something that constrains the population size
The condition called dysuria is characterized by painful or difficult urination, it can be due to pathologic or benign causes.
Turn off the lights when not in use, turn off all appliances when not used, remove your phone from the charger when its at full charge, heaters and air conditioners should be turned off when not in use, and using a regular sharpener rather than an electric one. Hope this helps. :)