The three phases of the policy debate in order are constructive, cross-examination, and rebuttal.
Explanation:
Constructive: each side performs their opinion for or against the resolution. The first constructive are normally prewritten.
Cross-examination: supporting each effective speech is a short question-and-answer session. The debater asking questions is generally given control over the cross-x.
Rebuttal: each side counters to the evidence of the defense and crystallizes their own cases. Normally uniquely new proof/arguments are not deducted in these speeches.
The option that best describes an action appropriate to the prewriting stage of writing a letter to the editor is sending your resume and an application to the editor.
An editor is responsible for taking a look at your resume and application - the editor's job is to go through such papers and see if there are any grammatical mistakes, vocabulary mistakes, or anything like that, and to prepare your papers to be read by an employer.