It is a simile
The sentence is comparing the arms to helicopters blades using *like
Look at the horses in this painting please How hard they seem to gallop How many horses are there This artist is famous for painting Western scenes ACROSS 2. The second word in the exclamatory sentence 4. The first word in the imperative sentence 7. The fourth word in the imperative sentence 9. The last word in the declarative sentence 10. The second word in the interrogative sentence DOWN 1.The last word in the exclamatory sentence 3.The last word in the imperative sentence 5.The fourth word in the declarative sentence 6. The last word in the interrogative sentence 8.
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It releases endorphins but also used in yoga to decrease stress and relax body. Chose one of these based off context of the question