The correct answer is: D. no change
The moon is revolving around the sun. This is a present tense sentence, and the verb “revolves” is in the correct tense. The other options are all in the past tense, which would not be correct for this sentence.
Option A: “revolves” is the present tense form of the verb “revolve.” It means to move around something in a circle.
Option B: “has revolved” is the past participle form of the verb “revolve.” It is used to form the present perfect tense and the past perfect tense.
Option C: “revolved” is the simple past tense form of the verb “revolve.” It means to move around something in a circle at a particular time in the past.
In this sentence, the moon is revolving around the sun at the present time. Therefore, the present tense verb “revolves” is the correct choice.