Concept:An anti-climax is a sudden drop from intense suspense to a weak or ordinary ending.Explanation:The passage creates great tension by describing the marching crowd, the war songs, and the frightened palace guards preparing for a siege.Readers expect a violent confrontation at the chief's palace.Instead, Sasu simply turns away and leads the crowd back, so the expected clash never happens.This sudden letdown of tension is the key feature of an anti-climax.Answer:D. anti-climax