What is an example of a change that occurs physically between the ages of 3 and 5?

The answer is correct because improving spatial ability is a significant cognitive development that occurs in children between the ages of 3 and 5. During this period, children become more adept at understanding the relationships between objects in their environment. They begin to grasp concepts like size, distance, and direction, which fosters their ability to navigate their world and engage in play that involves spatial awareness, such as building with blocks or drawing.

The other options present changes that either do not fit the developmental timeline accurately or describe less optimal physical changes. Rapid weight gain without an increase in height can indicate nutritional concerns rather than typical growth patterns. An increased appetite with no weight gain could suggest underlying health issues. A lower center of balance leading to instability might reflect a lack of physical coordination rather than healthy development. In contrast, the growth in spatial skills directly reflects the cognitive and physical advancements occurring at this age, making it the most fitting example of a change that occurs physically during this developmental stage.