What are the positive and negative changes in the environment

What produces wave a)sound b) heats c)transfer of energy d)vibrations

What type of matter is made of only one kind of atom

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 ?