No it would not consider on being a full sentence.
Explanation:
Ad the answer choices so I can help you dude
Come of age means growing up. When you have more responsibilities, when you're moving from childhood to adulthood and understand more things. When you are changing but not only physically, also mentally. When you are becoming more MATURE.
Media literacy means that they are able to analyze many types and forms of media.
On is the only preposition in this sentence. A preposition shows location, such as, on, over, beside, etc.