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tatiyna
3 years ago
13

HelpHelpHelpHelpHelpHelp

Chemistry
2 answers:
user100 [1]3 years ago
6 0

Answer:

d

Explanation:

Schach [20]3 years ago
3 0
Answer: b
A closed system is when energy cannot pass through or pass out of something. With the lid being closed around the jar, the energy cannot be passed through. While with the other answers like d, the shell around a hermit crab is still opened a little, so energy can pass through it, not making it a closed system
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