Protects :

Answer: Option C

Defends: protect from harm or danger.
Deprives: prevent (a person or place) from having or using something
Devises: plan or invent (a complex procedure, system, or mechanism) by careful thought
Secures: fix or attach (something) firmly so that it cannot be moved or lost
Deserts: to abandon that is to stop supporting or looking after
Protects: keep safe from harm

so the correct answer is Deserts.