Which of the following methods is best suited for teaching science?

Science is fundamentally an empirical, hands-on discipline: concepts such as chemical reactions, forces, and biological processes are grasped most durably when learners directly manipulate materials, observe outcomes, and construct understanding through first-hand experience, rather than through verbal exchange or abstract logical reasoning alone. This "learning by doing" principle underlies activity-based, constructivist science pedagogy and is the basis on which curriculum guidance frames effective science instruction.

Applying this to the four methods on offer, the activity method directly embodies the principle: it engages students in experiments, observation, and direct manipulation of materials, which is exactly what science teaching is built around. The other three methods each serve a real but narrower or supplementary role in a science classroom.

• Discussion is a verbal exchange of ideas and interpretations; it helps consolidate or debate concepts already encountered, but it does not by itself give students the direct empirical engagement science requires.

• Role play has students enact characters or scenarios to dramatize a situation or process; it suits topics with a social, historical, or behavioural dimension more than direct manipulation of physical or scientific phenomena.

• Deduction applies an established general rule or principle to a specific case to derive a conclusion; it is useful for applying and verifying scientific principles already known, but, unlike the activity method, it does not by itself give learners the hands-on, evidence-gathering experience central to how science is taught and understood.

• Activities place the learner in direct contact with materials and phenomena, observing, experimenting, and testing, which matches how scientific knowledge is actually built and verified.

Hence, among the options given, Activities is the method best suited for teaching science.