Aggressive is related to Hostile. Hostile is a synonym of Hard. Hard is related to Cover. 
Survivor is a type of Animal. Animal is part of Ecosystem. Forest is a type of Ecosystem. Forest is related to Deep. 
Aggressive <--RelatedTo--> Hostile <--Synonym--> Hard <--RelatedTo--> Cover 
Survivor --IsA--> Animal --PartOf--> Ecosystem <--IsA-- Forest <--RelatedTo--> Deep 