Concept:Learning plateau refers to a flat period in the learning curve where no visible progress occurs despite continued practice.Explanation:In the learning process, a plateau appears as a long horizontal stretch. During this stage, the learner shows no improvement even with extra practice. This happens after reaching a high level of mastery, leading to boredom. To overcome it, teachers should use innovative methods, provide rest, and give incentives. Thus, learning plateau is essentially an arrested or stalled growth in learning.Answer:A. arrested growth in learning