Final answer:
Bernini's David is the sculpture depicted in life-size, actively engaging the viewer, characterized by its dynamic Baroque style.
Step-by-step explanation:
The sculpture that was depicted in life-size, engaging the viewer in the action is Bernini's David. Unlike Michelangelo's David, which stands in a calm contrapposto pose, or Donatello's more youthful David, standing over Goliath's head, Bernini's David is shown in mid-action, with intense expression and dynamism, moments before the stone is hurled at Goliath. This brings the viewer into the scene, as if witnessing the event in real time, which is characteristic of the Baroque style's emphasis on movement and the involvement of the viewer.