Concept:Problem-solving is a learner-centered teaching method that follows a sequence of steps.Explanation:The first step is to recognize and clearly define the problem. Without identifying the problem, further steps like data collection, hypothesis formation, and testing cannot begin. The correct order is: identification of problem, data collection, formulation of hypothesis, testing hypothesis, and generalization. Thus, the initial step is always identification of the problem.Answer:B. Identification of problem