Final answer:
The assertion that children of a certain age have a low activity level and energy is false; children are commonly energetic and active throughout middle childhood.
Step-by-step explanation:
The statement asserting that children are known for their low activity level and energy is false. In fact, children, especially during middle childhood, are usually highly energetic and often engage in physical activities, including sports and peer-group activities. It is important to understand that child development involves a variety of changes, including physical growth and emotional maturation. Children in the six to ten-year age range may show rapid self-esteem changes, desire more privacy, and still occasionally exhibit behaviors associated with earlier childhood stages, such as tantrums.