Identify what you see as the main purpose of security management and discuss what is meant by the statement that ‘security measures must be commensurate with the threat’.

The title of the Essay is too long so this is it here; Identify what you see as the main purpose of security management and discuss what is meant by the statement that ‘security measures must be commensurate with the threat’. I have 1500 words typed of my own, I would like it reviewed and If needed advice on where It needs correcting or adjusted. Thanks