Synovial joints have the greatest range of flexibility and motion. select the best answer from the choices provided. t f

This is true. That is becasue synovial joints is just a fancy scientific term for joints like knees and wrists and ankles, which are indeed the joints with the greatest flexibility. Just look at your elbow and knees and how much they can be flexed and to what extent. Same goes for wrists and ankles who can rotate round and round.

The zone your looking for is the intertidal zone.