Please choose the correct answer to the 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?

Answer1: duty Answer2: wisdom Answer3: kindness Answer4: curiosity

Answer format: answer1/answer2/answer3/answer4
Answer: answer4