Coherent:capable of thinking and expressingyourself in a clear and consistent manner.
it is wellplanned, so that it is clear and sensible and all its parts gowell with eachother.
Example:The President's policy is perfectly coherent.
Comprehensive: complete and including everything that is necessary
What is Comprehensive Writing? A broad term that highlights features like grammar, spelling, punctuation, framing of a decentsentence, paragraphetiquette, etc.