When a river deposits sediment which 2 spheres are interacting

9) a & b

10) true.

11) false.

12) false.

13) true.

14) false.

15) true.

16) true.

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answer; adjusting and adapting to a culture other than one's own;

answer; because they must appeal to a broad cross-section of the population;

answer; an unrepresentative sample;