Explanation: Descriptions of a topic that prove the writer's point; making a description is just about telling you about something, that's not proving their point. Evidence is factual, factual = true so if writers get their evidence from a text or research they're proving their points; that's why B is correct. Opinions from their heart, is obviously so wrong because how can an opinion support another opinion; it doesn't make sense. Opinions aren't facts so it wouldn't work. Photographs and illustrations won't work, instead, be more verbal.
