Choose the word which is different from the rest.

The correct answer is C. Electronics.

The other four options are all branches of physics, which is the natural science that studies matter and its motion through space and time, along with related concepts such as energy and force. Electronics, on the other hand, is a branch of engineering that deals with the design, construction, and application of electronic circuits.

Here is a brief explanation of each option:

• Dynamics: The study of how forces affect the motion of objects.
• Mechanics: The study of the motion of objects under the action of forces.
• Optics: The study of light and its properties.
• Physics: The natural science that studies matter and its motion through space and time, along with related concepts such as energy and force.