Selected is a form of Select. Select is a synonym of Opt. Opt is related to Decide. 
Earth is related to Sand. Sand is related to Powder. Powder is a synonym of Cocaine. 
Selected --FormOf--> Select <--Synonym--> Opt <--RelatedTo--> Decide 
Earth <--RelatedTo--> Sand <--RelatedTo--> Powder <--Synonym--> Cocaine 