64. If the writer were to delete the underlined portion (adjusting the punctuation as needed), the essay would primarily lose:

Answer and Explanation

Your Answer is

Correct Answer is H

Explanation

After the underlined part, made boat travel to the area treacherous (dangerous) is an attributive that modifies icebergs, so after the underlined part is deleted, the reason for "dangerous" will be lost, so the explanation of H is correct.