Teenage is a synonym of Adolescent. Adolescent is a synonym of Teen. Teen is related to Age. Age is related to Life. 
Variable is a type of Thing. Variable is a type of Quantity. Quantity is a type of Concept. Regulation is a type of Concept. 
Teenage <--Synonym--> Adolescent <--Synonym--> Teen <--RelatedTo--> Age <--RelatedTo--> Life 
Thing <--IsA-- Variable --IsA--> Quantity --IsA--> Concept <--IsA-- Regulation 