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Answer:
1. Complex machine(?)
2. Energy transformation
3. SONAR
4. Echo-location
5. Geothermal Energy
6. B
7. C
8. D
9. E
10. A
Answer:
1. complex machines
2. energy
3. sonar
4. echolocation
5. geothermal
6.b
7.c
8.d
9.e
10.a
Explanation: 7 and 10 not sure