Surprisingly to those who view the ocean floor as a uniformly ______ waste, each vent in the floor, where seawater is heated by the earth’s inte-rior magma, has been found to be an island-like ______ with its own distinctive fauna.

(A) density
(B) mystery
(C) velocity
(D) consistency
(E) minuteness

(A) symphony : composer
(B) easel : painter
(C) caption : cartoonist
(D) soliloquy : playwright
(E) potboiler : novelist