Expansion is a type of Increase. Increase is related to Movement. Movement is related to Dance. Dance is related to Physical. 
Math is related to Physics. Physics is related to Lift. Lift is related to Step. Step is related to Placement. 
Expansion --IsA--> Increase <--RelatedTo--> Movement <--RelatedTo--> Dance <--RelatedTo--> Physical 
Math <--RelatedTo--> Physics <--RelatedTo--> Lift <--RelatedTo--> Step <--RelatedTo--> Placement 