✔ 最佳答案
The ceremony was held in honor of those who had served their country in the military.
in honor of those ...是一個「介系詞片語」(片語介系詞+代名詞),用來當作述部was held的「修飾語」,屬於「副詞」性質。who had served their country in the military是「形容詞子句」,用來當作代名詞those的「修飾語」。
較長的述部修飾語,通常放在句尾,因為這樣比較自然,不會讓句子頭重腳輕。