Translational movement involves which of the following?

Translational movement refers to motion where all parts of an object or body move in the same direction at the same time. This type of movement indicates that there is no rotation involved; instead, it describes a straight path of travel where the entire body or a part of a body is displaced uniformly.

In the context of body movements, when we talk about translational movement, it exemplifies actions such as walking where both legs move forward together, or when an arm moves straight ahead without any rotation. This aligns directly with the definition of translational movement, making the choice indicating body parts moving in the same direction at the same time the correct answer.

Conversely, options that involve circular motion or differentials in movement between limbs do not align with the principle of translational movement, as they introduce complexities such as rotation or varying trajectories among body parts, which are not characteristic of translational motion.