Ethan began making a model to show the processes which resulted in the formation of oceans. Art shows three boxes connected with arrows. The label on the first box is 'Sea floor spreading', second box is 'Earth's plates meet',and the third box is labeled with a question mark.

Which of the following would be the next step in the process?

Crust is broken down
Earth’s crust moves
Earth’s plates meet
Sea floor spreading

Arthritis results when synovial joints are damaged and can no longer move freely. the joints between the ossicles, found in the middle ear, are synovial joints. if they became stiff from arthritis and their movements were limited, sound waves striking the tympanic membrane would not be efficiently transferred to the oval window of the cochlea. without that transmission, the fluid in the cochlea cannot move the hair cells on the organ of corti. if those hair cells do not move, no impulses relaying information about sound can be generated.