Final answer:
Child quarrels over sharing can be attributed to developmental stages and resolved through guidance. The experience of noticing faint stimuli in a quiet room relates to the concept of absolute thresholds. Pets hear things humans cannot due to their different, often more acute sensory thresholds.
Step-by-step explanation:
When we observe a 6-year-old quarreling with a 4-year-old over sharing an orange, we can infer that this behavior is due to the developmental stage known as egocentrism, where children have difficulty seeing situations from other perspectives than their own. In the future, as they grow older, they'll likely develop better sharing skills and empathy through guidance and positive modeling of behavior. To control and hopefully resolve the conflict, an adult can step in to mediate, perhaps by suggesting a fair way to divide the orange, while also explaining the importance of taking turns and sharing.
In the exercise of lying down quietly in a bedroom to observe sensory experiences, one can understand the concept of the absolute threshold. This concept can be illustrated by noticing when we can barely detect faint noises or dim lights in the room, which represents the limit at which our senses can detect stimuli 50% of the time. This experience helps us appreciate how our senses work and how they are related to the absolute threshold concept.
Regarding pets hearing things humans often cannot, it relates to the difference in sensory thresholds between species. Animals such as dogs have a more acute sense of hearing than humans, hence their ability to detect sounds that are below the human absolute threshold. This means they can hear quieter sounds that we typically cannot, which is why they seem to react to noises we do not notice.