Read the following poem by Emily Dickinson.

Water, is taught by thirst.
Land—by the Oceans passed.
Transport—by throe—
Peace—by its battles told—
Love, by Memorial Mold—
Birds, by the Snow.

What represents the best summary of the central idea of the poem?

You do not know what you have until it is gone.

Humankind struggles against natural forces.

The passage of time is devastating.

Losing a great love teaches appreciation.

Losing a great love teaches appreciation.