The Malacca strait separates Malaysia from Sumatra.
The Strait of Malacca is a narrow, 805 km (500 mile) stretch of water between West Malaysia)and the Indonesian island of Sumatra. It also connects the Pacific Ocean to the east with the Indian Ocean to the west.
The 500 mile/805 kilometer long stretch of water between the Malaysia Peninsula and the Indonesian island of Sumatra is ka the Strait of Malacca. It connects the Pacific Ocean on the east, to the Indian Ocean on the west.
A strait is a narrow waterway that connects two larger bodies of water. Some famous examples include the Strait of Gibraltar (connecting the Atlantic Ocean to the Mediterranean Sea), the Bering Strait (between Alaska and Russia), and the Strait of Malacca (between Malaysia and Indonesia).
An isthmus is a narrow body of water between two lands.
That would be the Strait of Malacca.
There are many names for the different areas of the water that separates Sumatra from Thailand. The South China Sea is a large body of water between the Indonesian Islands, (including Sumatra), and Indo-China, where Thailand is. Depending on where you are on Sumatra, you may encounter the Strait of Malacca (between Sumatra and the Malay Peninsula, the Karimata Straight in the Java Sea (between Sumatra and Borneo), and the Gulf of Thailand, which would have to be sailed through if one wanted to land in Thailand. Alternatively, the Andaman Sea, north of the tip of Sumatra, could be used to get to Myanmar, which borders Thailand.
Canals; they have two lands and a narrow body of water in between!
The Sunda Strait
isthmus
Water.
a strait is a narrow passage (found in my social studies book)