Choose the correct item. Look at Jane! She a red dress today!

The sentence describes an action happening right now, so the present continuous tense is appropriate. 'She' is a singular subject, requiring the third-person singular form of the verb. Therefore, 'is wearing' is the correct choice. The structure is Subject + is/am/are + verb-ing. In this case, Jane (She) + is + wearing. The other options are incorrect because 'is wear' is grammatically incomplete, 'wears' is simple present and implies a habitual action, and 'wear' is the base form and does not agree with the singular subject in the present tense.

Answer: 's wearing