Final answer:
Marquette, Joliet, and LaSalle were all French explorers who played a significant role in expanding French influence in North America.
Step-by-step explanation:
Marquette, Joliet, and LaSalle, all have in common that they were all French explorers. They were part of the early expeditions that explored and mapped the North American continent in the 17th century. For example, Marquette and Joliet explored the Mississippi River, while LaSalle explored the Great Lakes region and the Mississippi River. These explorers played a significant role in expanding French influence and presence in North America.