Option 1 -> obituary: A notice of death with biographical details, not a speech of praise.
Option 2 -> harangue: A lengthy, aggressive speech, often critical rather than praising.
Option 3 -> denunciation: Public condemnation or criticism, the opposite of praise.
Option 4 -> eulogy: A formal speech or writing that highly praises someone.
Hence, Option 4: eulogy -> A panegyric is a formal public speech or text expressing elaborate praise, which is exactly what a eulogy does. Both terms refer to speeches that extol someone's virtues and achievements. In this context, the coronation speech praised the monarch's wisdom and justice, making "eulogy" the perfect synonym -> correct