Answer:
Door and window.
Explanation:
Synovial joints are those joints which are found between bones that move against each other, e.g. shoulder, hip and knee etc. Movement of door and window are the example of synovial joints because door and window also moves around fix axis just like these joints. Thare also some other examples of synovial joints such as liver etc.
I know I am late but this is the sample response: The technology being described is fiber optics. Since they are small and flexible, they enable doctors to see areas that they might otherwise be unable to see without surgery. Have a nice day!
