Concept: A good biological drawing must have correct labels with guidelines that clearly touch the labelled structure.Explanation:The student failed because the labels on the mango leaf diagram were incorrect.Also, the guidelines drawn from the labels did not touch the structures they were meant to identify.These errors make the diagram inaccurate and untidy, which would cause loss of marks in a Biology test.Answer: A: labels were wrong and the guidelines were not touching the structures.
