Why were the first shots at lexington, massachusetts called “the shots heard around the world”?

The reason it is called the "Shots Heard Around the World" is because no one knows who shot them, it cause a great amount of confusion, and in that one shot... 8 Americans died! In all the commotion people started drumming and sounding alarms making that one shot caused the loudest reaction and gained itself the "Shot Heard Around the World."

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the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.