Select the option that expresses the given sentence in active voice.

A lot has been learnt from my experiences.

I have learnt a lot from my experiences.

The correct active voice of the given sentence is I have learnt a lot from my experiences.

The passive voice of the sentence is A lot has been learnt from my experiences. This sentence is in the present perfect tense, which is used to describe an action that has happened in the past, but the time of the action is not specified. 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 "I" and the main verb is "learn." The past participle of "learn" is "learnt." So, the passive form of the sentence is A lot has been learnt from my experiences.

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 "I" and the main verb is "learn." So, the active form of the sentence is I have learnt a lot from my experiences.

The other options are incorrect because:

• I will learn a lot from my experiences. is in the future tense, while the original sentence is in the present perfect tense.
• I would learn a lot from my experiences. is in the past subjunctive mood, which is used to express wishes or requests.
• I will have learnt a lot from my experiences. is in the future perfect tense, which is used to describe an action that will have happened in the future before another action happens.