For a research paper, you need to organize a hierarchy of concepts, starting with a broad topic and breaking it down into subtopics and details.
Which mind map type is best?

You want to brainstorm ideas around a central theme for an essay, freely associating related concepts without a strict structure.
Which mind map type is best?

You need to analyze the causes and effects of a problem to identify root causes and possible solutions.
Which mind map type is best?

You want to compare and contrast two related concepts, showing similarities and differences visually.
Which mind map type is best?

You are planning a project schedule and would like to display events or milestones in chronological order.
Which mind map type is best?