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

Fact 2: Hydrothermal vents are powered by the heat of submarine volcanoes.

Given the two facts above, answer the question "What clusters around the heat of submarine volcanoes?" with the following options: 
- ferns
 - organisms
 - vegetation
 - humans
 - emissions
 - Energy
 - insects
 - the sun


 

  organisms       