Select the option that expresses the given sentence in active voice

This match is being watched today by more than thirty-three million people worldwide.

More than thirty-three million people worldwide are watching this match today.

The correct active voice of the given sentence is More than thirty-three million people worldwide are watching this match today.

The passive voice of the sentence is This match is being watched today by more than thirty-three million people worldwide. This sentence is in the present progressive tense, which is used to describe an action that is happening now. The passive voice of the sentence is formed by putting the subject of the active sentence after the verb "to be" and the present participle of the main verb. In this case, the subject of the active sentence is "this match" and the main verb is "watch." The present participle of "watch" is "watching." So, the passive form of the sentence is This match is being watched today by more than thirty-three million people worldwide.

The active voice of the sentence is formed by putting the subject of the passive sentence before the verb and removing the verb "to be." In this case, the subject of the passive sentence is "more than thirty-three million people worldwide" and the main verb is "watch." So, the active form of the sentence is More than thirty-three million people worldwide are watching this match today.

The other options are incorrect because:

• This match is watching more than thirty-three million people worldwide today. is in the active voice, but the subject of the sentence is "this match," which is not the one doing the action. The subject of the sentence should be "more than thirty-three million people worldwide."
• More than thirty-three million people worldwide have been watching this match today. is in the present perfect tense, while the original sentence is in the present progressive tense.
• Today more than thirty-three million people worldwide have watched this match. is in the present perfect tense, which is used to describe an action that has happened in the past but is still relevant to the present. The action of watching the match is not something that is still relevant to the present.