Final answer:
The first phase of the 3-x-3 writing process is planning, where brainstorming ideas is the primary activity. This phase allows the writer to gather thoughts and identify the purpose before drafting the document. Thus, the correct answer is B) Brainstorming ideas.
Step-by-step explanation:
The first phase of the 3-x-3 writing process involves planning and preparing for the written document. This phase primarily focuses on brainstorming ideas, which is fundamental before moving on to drafting and subsequently revising the content.
During brainstorming, writers collect thoughts and ideas, create outlines, and define their purpose for writing. It is a critical step that allows for the exploration of topics and positions, which can later be developed and refined throughout the writing process.
The other options provided such as final editing (A), revising content (C), and proofreading for errors (D) are parts of the subsequent phases, which typically involve reviewing and perfecting the document after a draft has been composed. So the correct answer to the question is B) Brainstorming ideas.