Read the passage from "Pilgrim At Tinker Hill"

As each green wave rose from the churning water, it illuminated within itself the six - or eight - foot - long bodies of twisting sharks.

A. Dangerous

B. Beautiful

C. Moving

D. Dark

As each green wave rose from the churning water, it illuminated within itself the six - or eight - foot - long bodies of twisting sharks. I would say this conveys a feeling of danger and apprehension as if leading up to a possibility whereby someone could get hurt by the sharks.