The correct answer is D. is being launched.
The verb “launch” is transitive, which means it takes a direct object. The direct object of the sentence “Look, a new missile is being launched” is “missile.” The sentence is in the present progressive tense, which indicates that the action is happening now.
The other options are incorrect because they are not in the present progressive tense. Option A, “is launched,” is in the simple past tense. Option B, “is launch,” is not a grammatically correct sentence. Option C, “is being launch,” is a typo.