Regarding the selection of teaching methods and the scientific solution of classroom problems, when a teacher uses the 'action research' cyclical model (such as Kurt Lewin's or Stephen Corey's cycle) to improve their teaching methodology, which of the following represents the most fundamental, logical, and sequential step-order of this research process?

Action research is a practical research conducted by teachers in the field of education to solve their teaching methods, classroom management, and immediate problems. First, the problem is identified and clearly defined, after which a hypothesis is formed for a potential solution, then data is collected to implement the intervention, and finally, evaluation is done to advance the cycle.