What is the greatest advantage of 'motivation' in the teaching-learning process?

→ In the context of 'Motivation', just before attaining the highest stage of 'Self-Actualization' in Abraham Maslow's 'Hierarchy of Needs Theory', which needs must an individual satisfy? → In the deep analysis of the dynamics of learning curves, specifically the 'convex curve' (decreasing returns curve) and 'concave curve' (increasing returns curve), when a learner begins acquiring a complex skill where learning progress is very rapid in the initial stage, but gradually with practice the rate of learning continuously declines and ultimately approaches a plateau, which of the following statements is the most authentic and scientifically accurate regarding this type of learning curve and its psychological causes? → What is the importance of 'Motivation' in teaching? → Under Abraham Maslow's 'Humanistic Theory of Motivation' or 'Hierarchy of Needs', the highest-level need is 'Self-Actualization', wherein an individual is motivated to achieve their highest human potential through the full development and utilization of their abilities, talents, and inner possibilities. Regarding its actual psychological implications and the scientific facilitation of students' creative development, autonomy, and intrinsic motivation in classroom teaching, which of the following psychological statements is most valid and scientifically sound? → What is the primary source of 'Motivation' in the teaching-learning process? → With what does the 'Motivation' cycle begin in the teaching-learning process?