How did scientists confirm which primate was the closest primate relative to humans?

Scientists confirmed the closest primate relative to humans through a combination of genetic, anatomical, and behavioral studies. Genetic analysis, particularly the comparison of DNA sequences, revealed that chimpanzees and bonobos share about 98-99% of their DNA with humans, indicating a close evolutionary relationship. Additionally, similarities in anatomical features and social behaviors further supported the conclusion that chimpanzees are our closest living relatives. These findings align with the fossil record, which also suggests a shared ancestry between humans and these primates.