Question

Look at da Vinci's Mona Lisa. This painting demonstrates his use of which painting technique?

Answer 1

The answer would be 
C. Sfumato.
Da Vinci used this technique a lot in his paintings, and the Mona Lisa is the most famous example of it.
-Hope it helps!

Answer 2

Hey there Jacob!

This would NOT be a (Worm's-eye view) illustration below to explain.

This would also NOT a be a (Trompe l'oeil) illustration below to explain

This would be a (Sfumato), but NOT a (Linear perspective)

Hope this helps you Jake!