Answer:
filtering is the action of separating elements using a filter, that is to say, literally, a material only allows certain elements to pass. example: a colander.
Explanation:
in a city it may be red / green lights ( for circulation )
Answer:
B
Explanation:
Most of earths water is not Drinkable.
Answer:
a
Explanation:
by digging up trees and stuff
It’s was caused by the volcanic mountain
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