Answer:
a ballooon filled with helium if sealed properly
Explanation:
balloons filled with helium will get stuck in the atmosphere
I need more information to answer this
The answer is: [B]: Gastro-
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(Note: Think: "gastrointestinal" (GI);
"gastric bypass";
"GERD" (for "gastroesophageal reflex disease");
"gastroenterology" / "gastroenterologist";
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Answer choice [A]: "Chiro-" refers to: "hand" (e.g. "chiropractor").
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Answer choice [C]: "Cord/o-" refers to: "cord", or "spinal cord";
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Answer choice [D]: "Dom- " is either non-existent or little known
(in terms of medical terminology).
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