(a) Motivation affects specific aspects of behavior. This is true as motivation energizes and directs behavior towards particular goals. (b) Motivation varies from child to child. This is also true, as individual differences, needs, and interests influence what motivates a child. (c) Affective arousal is found in the condition of motivation. While emotions can be part of motivation, not all affective arousal is necessarily motivation, and motivation isn't solely defined by affective arousal. It's more about the drive and direction towards a goal. (d) Unmotivated students are easily distinguishable. This is not always true. Lack of motivation can manifest in various subtle ways, and it's not always evident or easily distinguishable. Students might be unmotivated due to underlying issues that are not immediately apparent.