Concept:Experimentation involves actively manipulating variables in a controlled setup to test a hypothesis and arrive at a precise conclusion.
Explanation:Option B (relation between temperature and evaporation) is most suitable because it allows students to conduct a simple, controlled experiment.
Students take two identical glasses of water, place one in a warm area and one in a refrigerator, then measure the water after one hour.
They observe that less water remains in the warm glass, proving that higher temperature increases evaporation rate.
This gives a clear, specific cause‑and‑effect conclusion through direct experimentation.
In contrast, Option A (ear size vs. hearing) is not easily testable in a classroom.
Option C (seed germination days) relies only on observation, not experimentation.
Option D (skin colour and camouflage) requires analysis of pre‑existing information, not an experiment.
Thus, Option B is the only activity that teaches arriving at a specific conclusion by manipulating variables and observing outcomes.
Answer:Option B. Understanding the relation between temperature of the surrounding and evaporation of water.