He is most likely looking at the ceiling while speaking
The rapid motion when the dog gets excited playing fetch and shakes can be called a quiver.
<h3>What are quiver and shake?</h3>
A shake is an uncontrollable physical movement that can be due to many reasons like excitement, fear, anger, etc. It can cause quivering, trembling, wobbling, palpitation, shuddering, etc.
Quivering is a noun or an adjective that means a slight movement or shaking that is used to show emotions of excitement that make someone happy.
Therefore, option c. quiver best replaces shakes in rapid motion.
Learn more about shake here:
brainly.com/question/16931815
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