Final answer:
Synovial joints allow a variety of angular movements including flexion, extension, abduction, pronation, supination, and rotation. These movements accommodate the dynamic range of actions we perform with our limbs and appendages.
Step-by-step explanation:
The angular movements allowed at synovial joints include several actions that change the angle between the bones of a joint. Flexion is the action of decreasing the angle between bones, such as curling the forearm up at the elbow. Extension is the straightening motion that increases the angle, such as straightening an arm at the elbow. Abduction is the movement away from the central axis of the body, such as moving the arm away from the body.
Rotation refers to the movement around an axis, such as turning the head from side to side. Pronation and supination are specific types of rotational movements at the forearm where the palm is turned downwards or upwards, respectively. These movements are specifically allowed by the structure and articulation of synovial joints.
Therefore, the movements that can occur at synovial joints and which are selected in this situation include abduction (a), extension (b), flexion (c), rotation (e), pronation (d), and supination (f). The final answer in a two-line explanation in 300 words is that synovial joints facilitate various forms of angular movement, including flexion, extension, abduction, and rotational movements like pronation and supination.