SE Asia physical & political features

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Across
  1. 4. Buddhism & Hinduism originated here
  2. 6. Shintoism originated here
  3. 7. Largest River to flow in just one country
  4. 8. Third largest ocean
Down
  1. 1. The northern country of the Korean peninsula
  2. 2. Largest Country in SE Asia
  3. 3. Moutain range that contains 9 out of 10 worlds largest peaks
  4. 5. Sacred river to the Hinduism religion(India)