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C. Gravitational Energy doubles as mass doubles.

Explanation:

For the platypus the height is 1 and the grav. energy is 9.8

As the height doubles to 2 (for the squirrel) the gravitational energy also doubles to 19.6 (9.8*2=19.6).

Same thing for the flying squirrel (2 height),(19.6 grav. energy)

(2*2=4)    (19.6*2=39.2) ---Skunk height:4 and Skunk energy:39.2

C. Gravitational energy doubles as mass doubles

Explanation:

answerspecific gravity;