Q: Where do organisms cluster on the ocean floor?\nOptions:\n- (A) neutralized water\n- (B) where they used to live\n- (C) hot alkaline water\n- (D) fissures of hot, acidic water\n- (E) sedimentary rocks\n- (F) fissures blasting cold water\n- (G) at or near the margins\n- (H) an area swollen with pus
Let's think step by step below.

User
Organisms cluster around hydrothermal vents in the ocean floor. Hydrothermal vents are fissures in the ocean floor that leak hot, acidic water. Organisms cluster around fissures in the ocean floor that leak hot, acidic water.
Thus, the answer is (D).
Assistant