Answer to Question 1
d
Answer to Question 2
Even though the model is an abstract representation that allows us to visualize what we can't observe directly, it provides us with considerable information. For instance, we see that working memory is smaller than either sensory memory or long-term memory, which is intended to remind us that its capacity is smaller than the other two stores. Also, we see fewer arrows to the right of attention than to its left. This tells us that we don't attend to all the stimuli we encounter; attention is a screen and helps us understand why we don't notice many of the stimuli we encounter until someone or something reminds us of them.