Select the correct passive form of the given sentence.

They are providing shelter to the homeless.

The homeless are being provided shelter.

The correct passive form of the given sentence is The homeless are being provided shelter.

The sentence "They are providing shelter to the homeless" is in the active voice. The active voice is formed by putting the subject of the sentence before the verb and the past participle of the main verb. In this case, the subject of the sentence is "they" and the main verb is "provide." The past participle of "provide" is "provided." So, the active form of the sentence is "They are providing shelter to the homeless."

The passive voice is formed by putting the subject of the active sentence after the verb "to be" and the past participle of the main verb. In this case, the subject of the active sentence is "the homeless" and the main verb is "provide." The past participle of "provide" is "provided." So, the passive form of the sentence is The homeless are being provided shelter.

The other options are incorrect because:

• The homeless have been provided shelter is in the past perfect tense, while the original sentence is in the present progressive tense.
• The homeless are been provided shelter is grammatically incorrect. The verb "to provide" is followed by a direct object, but the phrase "the homeless are been provided shelter" does not have a direct object.
• The homeless will be provided shelter is in the future tense, while the original sentence is in the present progressive tense.