Definition of active voice.
Active voice when the subject does the action the verb is in active voice. Eg; I eat mango. in this subject is the door and the work done upon mango so mango is the object and 'I' is the subject. Subject = I Object= mango. For more you can wash my I YouTube videos to click on the given link https://youtu.be/Ya2ESRdmr4w If the link doesn't work here then you can search as Zia tutorial on YouTube thanks.