Question

Clustering can help a writer determine what?

Answer 1

Clustering (a type of pre-writing) helps a writer explore many ideas as they can in the instant it is thought of (the idea), and is usually recorded in the form of a document (or notes).

Answer 2

Clustering is a type of prewriting that allows you to explore many ideas as soon as they occur to you. Like brainstorming or free associating, clustering allows you to begin without clear ideas.