Person does not want (to) Vulnerable. Person wants (to) Explain. Explain is the opposite of Question. Question is related to Curiosity. 
Hazard is related to Dangerous. Dangerous is related to Vulnerable. 
Vulnerable <--NotDesires-- Person --Desires--> Explain <--Antonym--> Question <--RelatedTo--> Curiosity 
Hazard <--RelatedTo--> Dangerous <--RelatedTo--> Vulnerable 