Concept:Learning measurement through hands-on activities with real objects helps students understand standard units and develop estimation skills.
Explanation:The activity uses a 1-meter rope to compare lengths of everyday objects.
It directly helps introduce the standard unit of length (meter) in a concrete way. So statement (a) is true.
Students estimate whether objects are about 1 m, less, more, double, or half — this builds estimation ability. So statement (b) is true.
The activity does not automatically establish the conversion formula between metre and centimetre; that needs separate instruction. So (c) is false.
Such activities are best done in class with teacher guidance and peer discussion, not only as home task. So (d) is false.
Answer:B. (a) and (b)