Which statement is a conclusion rather than a direct observation?

Correct answer: The plant wilted due to lack of water

Option D gives a cause—lack of water—for the plant’s wilting. A cause cannot be known by looking alone; it needs evidence such as soil moisture, watering history, or other observations. In contrast, a leaf’s colour, surface texture, and length can be directly observed or measured. Exam tip: A statement explaining “why” something happened is often a conclusion.