Conservation is a type of Improvement. Repair is a type of Improvement. 
Insect is related to Nest. Nest is related to Member. Member is related to Apply. Apply is related to Credit. 
Conservation --IsA--> Improvement <--IsA-- Repair 
Insect <--RelatedTo--> Nest <--RelatedTo--> Member <--RelatedTo--> Apply <--RelatedTo--> Credit 