I suggest either talking or emailing the person grading the exam or someone who could help you.
because humans count on coral reefs and the sealife they support,coral reefs should be able to count on humans too.
He thinks that they will help because C. They are all clergymen.
Symbolic Archetypes
Here are examples:
Light - Hope or renewal
Dark - Despair or ignorance
Water - Birth and life
Haven - Safety
Wilderness - Danger
Fire - Knowledge, rebirth
Ice - Death, ignorance
Black - Evil, mystery
Red - Passion, blood
Green - The earth, growth
White - Purity, peace, innocence
Three - Trinity; mind, body, spirit
Four - Seasons, elements
Square - Stability
Circle - Heaven, perfection, eternity
Spiral - Cosmic motion, growth
Clouds - Mystery
Crescent moon - Change
Lightning - Inspiration
Hourglass - Time passing
Heart - Love
curious and eager I think