Age is related to Reason. Reason is related to Explanation. Explanation is related to Describe. 
Scary is related to Test. Test is a synonym of Prove. Prove is a synonym of Show. 
Age <--RelatedTo--> Reason <--RelatedTo--> Explanation <--RelatedTo--> Describe 
Scary <--RelatedTo--> Test <--Synonym--> Prove <--Synonym--> Show 