Please answer in details. what class of carbon is coal

Geothermal energy for industrial use is available almost anywhere. a.true b.false

Which element would mostly likely have an electron affinity measuring closest to zero

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?