Concept:Effective paragraph writing depends on clear ideas, logical presentation, and smooth coherence among sentences.
Explanation:An effective paragraph must start with relevant ideas that directly support the main topic.
These ideas should be well‑developed with proper examples and details.
Presentation refers to the structure: a strong topic sentence, supporting sentences, and a concluding sentence.
Coherence means sentences connect logically using transitional words and phrases.
Legible handwriting (option A) is a general writing skill, not specific to paragraph content.
Using difficult words (option B) can reduce clarity and is not necessary for effective paragraph writing.
Flowery language (option D) may distract from the main ideas and make the paragraph complex.
Thus, the essential elements are ideas, presentation, and coherence.
Answer:C. ideas, presentation and coherence