Select the correct passive form of the given sentence. My father fixed the computer easily.

The computer was fixed by my father easily.

The correct passive form of the given sentence is The computer was fixed by my father easily.

The active voice of the sentence is My father fixed the computer easily. This sentence is in the simple past tense, which is used to describe an action that happened in the past. The passive voice of the sentence 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 "my father" and the main verb is "fix." The past participle of "fix" is "fixed." So, the passive form of the sentence is The computer was fixed by my father easily.

The other options are incorrect because:

• The computer is fixed by my father easily. is in the present tense, while the original sentence is in the simple past tense.
• The computer was fix by my father easily. is grammatically incorrect. The verb "was" is singular, but the subject of the sentence, "computer," is plural.
• The computer fixed by my father easily. does not have the verb "to be" in the correct tense. The passive voice of a sentence always has the verb "to be" in the correct tense.