Answer:
"Tom's cooking skills leave room for improvement" means that Tom's skills could use some help, as his skills need some improvement for cooking.
Explanation:
So basically Tom's cooking skills aren't that bad, it's just that his cooking skills need some improvements.
Prewriting = this is a research stage. You have to gather and select informations or ideas
drafting = in this phase you should write your ideas and develop them.
revising - this phase of writing involves rewriting
editing - this stage involves checking spelling, grammar, punctuation etc
So your answer is revising phase - B
