The correct answer is: Aditi speaks three languages: English, French and Spanish.
The verb “speak” is used to talk about the ability to communicate in a language. It is conjugated in the present tense, which means that it is used to talk about things that happen regularly or repeatedly. In this case, the sentence is saying that Aditi is able to speak three languages.
The other options are incorrect because they are not conjugated in the present tense. Option B, “speaks,” is conjugated in the third person singular present tense. This would be used to talk about someone else who is able to speak three languages. Option C, “spoken,” is the past participle of the verb “speak.” This would be used to talk about something that has already happened, such as “Aditi has spoken three languages since she was a child.” Option D, “spoke,” is the simple past tense of the verb “speak.” This would be used to talk about something that happened in the past, such as “Aditi spoke three languages at the conference.”