题目解析:
本题关键词是 HMS Beacon 和 Aegean Sea,定位回原文找到这一句:In 1841 Edward Forbes was offered the chance to serve as naturalist aboard HMS Beacon, an English Royal Navy ship assigned to survey the Aegean Sea. 答案在这个定语从句里:HMS Beacon, an English Royal Navy ship assigned to survey the Aegean Sea. HMS Beacon 是一艘船,是去调查 Aegean Sea 的。选项 D 符合这句话的意思。其他三个选项均与此句无关。