Habit is a type of Dress. Habit is related to Group. Group is related to Bunch. 
Obstacle is related to Course. Course is related to Soup. Soup is a type of Composition. 
Dress <--IsA-- Habit <--RelatedTo--> Group <--RelatedTo--> Bunch 
Obstacle <--RelatedTo--> Course <--RelatedTo--> Soup --IsA--> Composition 