Fact 1: Organisms cluster around hydrothermal vents in the ocean floor.

Fact 2: Chimneys top some hydrothermal vents.

Given the two facts above, answer the question "What do organisms cluster around in the ocean floor?" with the following options: 
- kalenchoes
 - ferns
 - bacteria
 - Chimneys
 - an object
 - alveoli
 - graptolites
 - allow growth


 

    Chimneys     