What body of water separates Buzzards Bay from Nantucket Sound?

Buzzards Bay and Nantucket Sound are both part of the coastal geography of Massachusetts, located adjacent to each other in the Atlantic Ocean. The Atlantic Ocean is the expansive body of water that encompasses both Buzzards Bay to the north and Nantucket Sound to the south.

Buzzards Bay serves as a northeastern arm of the Atlantic, and Nantucket Sound is adjacent, acting as a transitional body of water before reaching the open ocean. While the other options listed might refer to significant bodies of water, they either do not directly connect to Buzzards Bay or Nantucket Sound or are located in different geographical areas. Long Island Sound, for example, is situated farther west of Buzzards Bay and is separated from it by the landmass of Long Island and the southern coast of Connecticut. Chesapeake Bay is located much farther south in the mid-Atlantic region, and Block Island Sound lies to the west of Rhode Island, which is again not in direct proximity to the two mentioned bays.

Therefore, the Atlantic Ocean is the correct choice as it serves as the overarching body of water that separates Buzzards Bay from Nantucket Sound, linking them as part of the coastline of Massachusetts.