Prevention is related to Coat. Coat is related to Sweater. 
Layer is a synonym of Level. Level is related to Amount. Amount is a type of Magnitude. Degree is a type of Magnitude. 
Prevention <--RelatedTo--> Coat <--RelatedTo--> Sweater 
Layer <--Synonym--> Level <--RelatedTo--> Amount --IsA--> Magnitude <--IsA-- Degree 