Concept:Science process skills include observation, classification, and hypothesis. Observation is noticing details using senses. Classification groups items by common properties. Hypothesis is a possible explanation based on observations.
Explanation:Learners observed the iron pillar and recorded its features like age and rust-resistance – this develops observation.
They then listed rusted iron items at home, grouping them by material – this develops classification.
Thinking about causes of rusting and ways to prevent it encourages forming possible explanations – this develops hypothesis.
Thus, the activity builds classification, observation, and hypothesis skills.
Answer:Option C: Classification, observation, hypothesis