Erm what the sigma of Southeast Asia

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Across
  1. 1. A floating vessel in water that people can be on
  2. 2. Growing crops for food
  3. 3. An area of soft wet land usually overgrown by grasses and sedges
  4. 5. A very popular edible grain that is grown and eaten in all of Asia
  5. 6. Act of catching fish
  6. 8. A vent in the Earth's crust that releases molten magma
  7. 12. A wild land overgrown with dense vegetation, often nearly impenetrable, especially tropical vegetation or a tropical rainforest
  8. 13. Not wet or moist nor hot
  9. 15. A smaller body of land surrounded by water
  10. 16. Very, very, very large body of water, that covers millions of square miles and has trillions of gallons of water
  11. 18. A type of precipitation that precipitates water
Down
  1. 1. Lots of sand on the shore of a river or ocean
  2. 4. A string of islands
  3. 6. A type of animal that lives in the ocean
  4. 7. A grassy plain in tropical and subtropical regions, with few trees
  5. 9. Body of water that is surrounded by land
  6. 10. A large steep feature on Earth's surface usually caused by tectonic plates
  7. 11. A hot humid environment/climate that is found in SE Asia
  8. 14. A large stream of moving water
  9. 17. A deep narrow valley with steep sides and often with a stream flowing through it