Sylvia was walking down the sidewalk pulling her new red wagon. It was a pretty fall day. Some of the leaves were turning colors and falling off the trees. She crunched through a pile of dry leaves

A). Exposition.

Explanation:

'Exposition' is defined as the element of the plot in which the author introduces the characters, setting, and background information to the readers which helps them understand the historical context in which the story is written and understand the narrative more effectively.

As per the question, the 'exposition' is demonstrated here as the author provides the introduction of the protagonist 'Sylvia' and description of the setting of the 'sidewalk', 'pretty fall day with leaves turning colors, falling off', etc. This allows the readers to have basic background information that the story is set in and hence, option A is the correct answer.

c. barbarians with unexpected intelligence  

recent brain research has shown some surprising benefits as a result of formal musical training. learning to play a musical instrument appears to develop parts of the brain that can even influence academic results. the studies indicate that the earlier a child begins training, the more benefits there are. one such study showed that children who began musical studies before the age of seven had a more developed brain in the region where language production and auditory processing take place. scientists believe there is mounting evidence to show that early musical training can improve brain function.

explanation: