Thinking can cause/lead to Tension. Thinking is related to Certain. Certain is a synonym of Inevitable. 
Investigation is related to Criminal. Criminal is related to Government. Government is related to Rule. Rule is related to Type. 
Tension <--Causes-- Thinking <--RelatedTo--> Certain <--Synonym--> Inevitable 
Investigation <--RelatedTo--> Criminal <--RelatedTo--> Government <--RelatedTo--> Rule <--RelatedTo--> Type 