Concept:Formative evaluation is an ongoing assessment that checks student progress during instruction, not at the end.Explanation:Formative evaluation is done during the teaching‑learning process to monitor learning. It helps identify student difficulties, improve teaching strategies, and boost motivation. Tools include oral tests, portfolios, and class tests. In contrast, summative evaluation happens at the end of a session or unit to measure overall achievement. Therefore, the correct time for formative evaluation is while teaching is ongoing.Answer:Option C: During teaching-learning process.