Question: Penlee Point, the coastal headland to the SW of the village of Rame in southeast Cornwall, UK, lies at the entrance of what body of water? 

Context paragraphs:
Penlee Point, Rame: Penlee Point (Cornish: Penn Legh , meaning "stone-slab headland") is a coastal headland to the southeast of the village of Rame in southeast Cornwall, UK.  The point lies at the entrance to Plymouth Sound.

Penlee Lifeboat Station: Penlee Lifeboat Station is the base for Royal National Lifeboat Institution (RNLI) search and rescue operations for Mount's Bay in Cornwall, United Kingdom.  The lifeboat station operated at various locations in Penzance from the early 19th century.  It moved to Penlee Point near Mousehole in 1913, thus gaining its current name, but was moved to Newlyn in 1983 without any change of name.  The station is remembered for the loss of the entire lifeboat crew on 19 December 1981.

Millbrook, Cornwall: Millbrook (Cornish: Govermelin ) is a civil parish and village in southeast Cornwall, England, United Kingdom.  The village is situated on the Rame Peninsula four miles (6.5 km) south of Saltash.  The population of Millbrook was 2,033 in the 2001 census,increasing to 2,214 at the 2011 census.

Penlee Battery: Penlee Battery is a nature reserve lying on the coastal headland of Penlee Point on the Rame Peninsula, in southeast Cornwall, England.

Rame Head (Victoria): Rame Head or Ram Head ( ) is a coastal headland in eastern Victoria, Australia.  It is within the Croajingolong National Park.

Rame, Maker-with-Rame: Rame (Cornish: Hordh ) is a hamlet between Rame Head and the village of Cawsand in South East Cornwall.  It is situated on the Rame Peninsula.  Rame means "the high protruding cliff", or possibly, "the ram's head".

Penlee Point, Mousehole: Penlee Point (Cornish: Penn Legh , meaning "stone-slab headland") is a promontory near the coastal fishing village of Mousehole in west Cornwall, England, UK.  It was the launching point of the Penlee lifeboat, which was lost in the disaster of 1981.

Cape Howe: Cape Howe is a coastal headland in eastern Australia, forming the south-eastern end of the Black-Allan Line, a portion of the border between New South Wales and Victoria.  Cape Howe was also the original name of West Cape Howe, a coastal headland near Albany, Western Australia that forms the westernmost extent of the Great Australian Bight.

Rame Head: Rame Head or Ram Head (Cornish: Penn an Hordh ) is a coastal headland, southwest of the village of Rame in southeast Cornwall, England, United Kingdom.  It is part of the larger Rame Peninsula.

Cornwall: Cornwall ( , ; Cornish: Kernow ] ) is a ceremonial county in the United Kingdom.  It is also a unitary authority area of England, administered by Cornwall Council.  The county is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar which forms most of the border between them.  Cornwall has a population of 556,000 and covers an area of 3563 km2 .  The ceremonial county of Cornwall also includes the Isles of Scilly, which are administered separately.  The administrative centre of Cornwall, and only city in the county, is Truro.

Supporting paragraphs: Penlee Point, Rame Cornwall
Answer: Plymouth Sound