Answer:
Ethan's parents were both born in Israel, but he was born in the United States.
Pedro's parents were both born in Spain, but he was born in the US territory of Puerto Rico
Sebastian was born in Greece, but he moved to the US with his parents before he was 2 years old
Step-by-step explanation:
A natural born US citizen is someone that was born in the United States of America or any of its territories, no matter its familiar background or heritage, and or any person that was born anywhere else but immigrated into the United States before he or she was 2 years old, so the three options that are natural born US citizens are Ethan, Pedro and Sebastian.