Hearing is a type of Opportunity. Life is a type of Opportunity. Survival is a type of Life. Survival is a synonym of Selection. 
Tide is related to Pattern. Pattern is a synonym of Category. 
Hearing --IsA--> Opportunity <--IsA-- Life <--IsA-- Survival <--Synonym--> Selection 
Tide <--RelatedTo--> Pattern <--Synonym--> Category 