A person who strongly and publicly supports or fights for a cause or idea.
“She has become a champion of affordable childcare in her community.”
“As a champion of clean energy, he pushed hard for the new legislation.”
When a passage describes someone as a 'champion' of a cause, it signals a strong, active supporter rather than a passive agreement. This distinction can help you gauge the intensity of a viewpoint when answering detail questions.
Synonyms: advocate, defender, proponent