Linear motion is not a fundamental principle of character animation. The other three principles, squash and stretch, anticipation, and follow-through, are essential for creating believable and expressive character movement.

Anticipation is the gradual increase in speed and intensity of an action before it reaches its peak. It helps to build tension and create a sense of momentum.

Follow-through is the animation technique that involves continuing the movement of a character or object after the action has stopped. It helps to create a sense of realism and weight.

Exaggeration is the term for the exaggerated features and movements used to emphasize a character's personality or emotions. It is a common technique used in character animation to create memorable and visually appealing characters.

Motion capture is not a type of character animation. It is a technique used to record the movements of a live actor and transfer them to a digital character.

Character design is the process of creating a character's appearance and personality. It involves developing the character's physical features, clothing, and backstory.

Adobe Photoshop is not a software commonly used for character animation. It is a raster graphics editor used for image editing and manipulation.

Rigging is the process of creating a character's skeleton and joints. It allows the animator to control the character's movement.

IK rig is not a type of character animation rig. IK stands for inverse kinematics, which is a method of animating a character's limbs by specifying the desired position of the end effector (such as the hand or foot) and then calculating the joint angles that will achieve that position.

Texturing is the process of adding color and texture to a character's model. It helps to bring the character to life and make it more visually appealing.

Ambient light is not a type of character animation lighting. Ambient light is a general, non-directional light that fills in the shadows and creates a sense of atmosphere.

Animation is the process of creating a character's movement. It involves creating a series of keyframes that define the character's position, rotation, and scale over time.

Bezier interpolation is not a type of character animation interpolation. Bezier interpolation is a method of creating smooth curves by defining a series of control points.

Sound design is the process of adding sound effects and music to a character animation. It helps to create a more immersive and engaging experience for the viewer.

JPG is not a common file format used for character animation. JPG is a raster graphics file format used for storing images.