Answer is A. The main purpose of a summary is to relay the main events/details of the story. If you are missing any needed info, the summary is incomplete
She or he must possess developmental editing skills. Must be creative, imaginative.
The internal structure of a piece of writing is known as organization.
The term refers to how you organize your writing - the way you sequence your paragraphs, how you connect them, the way you transition from one thought to another. There are various ways to organize your work, and you should choose the one which suits you best.