Physics is related to Gravity. Gravity is related to Nature. 
Clothes is related to Doll. Doll is related to Have. Have is related to Afford. Afford is related to Pay. 
Physics <--RelatedTo--> Gravity <--RelatedTo--> Nature 
Clothes <--RelatedTo--> Doll <--RelatedTo--> Have <--RelatedTo--> Afford <--RelatedTo--> Pay 