description of the pictures

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Across
  1. 5. the solution they found
  2. 7. synonym of obstacle
  3. 10. an obstacle the agent facing
  4. 11. cause of the obstacle
Down
  1. 1. roots of the problem
  2. 2. nature of the problem
  3. 3. synonym of worthy*
  4. 4. the purpose of the journey
  5. 6. the system they want to escape
  6. 8. the agent
  7. 9. another obstacle