Question

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in alphabetical order, the layers of the atmosphere are the , mesosphere, , thermosphere, and .
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Explanation:

The layers of the atmosphere are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Arranged alphabetically: exosphere (starts with 'e'), mesosphere (already given), stratosphere (starts with's'), thermosphere (already given), troposphere (starts with 't').

Answer:

exosphere, stratosphere, troposphere