ऑटोमोबाइल से निकलने वाले जहरीले कचरे को सुरक्षित रूप से निपटाने के लिए वैज्ञानिक रूप से तैयार की गई विधियों को अपनाने का प्राथमिक कारण निम्नलिखित में से कौन सा है?

Arrange the following assessment methods in ascending order—moving progressively from indirect observation to deep attitudinal probing: (K) Observing spontaneous behaviours. (L) Asking children to describe what they saw using simple picture-based attitude scales. (M) Asking children 'why' they think something happened. (N) Analysing reasoning in group discussions.

The following statements describe the process of concept development in Environmental Studies. Arrange them in the correct pedagogical sequence: (K) Children observe their surroundings. (L) Teacher facilitates discussion and reflection. (M) Experiences are shared in class. (N) Concepts are formed. (O) Concepts are applied to daily life.