Final answer:
Bob's stomachache during a presentation is an example of a physical component of emotion. Carl's motivation for mowing the yard is extrinsic, and Jane's attribution of her grade to her professor's dislike indicates an external locus of control.
Step-by-step explanation:
Bob is experiencing the physical aspect of an emotion when he gets a stomachache while being called to give a presentation. Emotions can be broken down into three parts: cognitive, which involves the mental assessment of the situation; behavioral, which encompasses the actions taken in response to the emotion; and physical, which refers to the physiological responses in the body. In Bob's case, the stomachache is a physiological response to the stress of public speaking, thus it represents the physical component of an emotion.
As for the other questions, Carl is motivated by extrinsic motivation as he performs the task of mowing the yard for monetary compensation. In contrast, intrinsic motivation refers to doing something for its inherent satisfaction rather than for some separable consequence.
In Jane's situation, she demonstrates a belief in an external locus of control, attributing her bad grade on the psychology paper to her professor's personal feelings rather than her own abilities or efforts.