A person who dies for their beliefs in known as a -

Martyr

Explanation:

A person who dies for their beliefs in known as a "Martyr." A Martyr is a person who studies and believes in a certain religion who would go through pain, persecution, and suffering just to spread their beliefs to other people. A good example of a Martyr is a religion called Jehovah's witnesses. In some countries where the religion is banned some of the followers who believe in the same thing face torture, life time in prisons, and even death for spreading their beliefs to other people.

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answer; taking up arms to defend the nation;

its c not d   tell me if that´s correct