A light year is the distance traveled by light in a year.
Answer: "symbiosis" ; or, a "symbiotic relationship" .
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I believe it would be c not exactly sure tho
A supension is formed when two or more materials are insoulable so they
rest on top of each other. For instance, sand and oil are insoulable
(unable to be mixed together) so based on density, one rises above the
other, making a suspension.
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