Which of the following types of joints allow considerable movements and therefore, play a significant role in locomotion?

Synovial joints are characterised by the presence of a fluid-filled synovial cavity between the articulating surfaces of the two bones. Such an arrangement allows considerable movement. These joints help in locomotion and many other movements. Synarthroses are immovable joints. Fibrous joints are immovable (syndesmoses are slightly movable). Cartilaginous joints are either immovable (synchondroses) or slightly movable (symphyses).