duty wisdom kindness curiosity
I gave my students this multiple choice question: A person named Leonardo da Vinci studied many things including animals, geology, clouds, and flight. His study of birds helped him design the first parachute. Everything he saw made him ask how and why. Which human quality most likely made this person want to study many different things?

Only one answer is correct among these 4 choices:
- duty
- wisdom
- kindness
- curiosity

Could you tell me which one is correct?

curiosity