Some children deeply understand the sacrifices their parents have made for them, and they strive to make them proud, no matter the circumstances. Alem Hadzic is one of these children. Just hours after his father’s funeral, the 18-year-old valedictorian ensured he attended his high school graduation to deliver a heartfelt speech, as reported by PEOPLE. Hadzic’s father was diagnosed with cancer during Alem’s senior year and passed away the day before his graduation…