Respuesta :
The sentence that has an elliptical adverb clause with an understood word or words is the first one - As we travel higher than does the sea level, the boiling point of water drops.
Instead of saying - as we travel higher that the sea level travels, you can omit the verb.
Instead of saying - as we travel higher that the sea level travels, you can omit the verb.
Answer:
As we travel higher than does the sea level, the boiling point of water drops.
Explanation:
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