Tonka is actively playing with his toy truck when his mom accidentally drops a towel she is carrying directly on top of the vehicle. As soon as the vehicle is covered, Tonka turns his head away and calmly begins playing with another toy. Tonka's reaction best illustrates a lack of .a. object permanence
b. inner speech
c. appearance as reality
d. reversibility

Read the rough-draft paragraph. exercising daily is one of the best ways to the body fight fatigue, illness, stress, and weight gain. whether taking a bike ride, enjoying a walk, or going for a swim, the type of activity is not as important as exercising consistently. often, people begin the new year with the resolution of exercising, but within a few months that commitment is quickly forgotten. the key is to choose something that is accessible, enjoyable, and affordable. exercising just thirty minutes a day not only strengthens the heart and lungs, but it also to boost one’s energy. another way to feel more energized is to eat a balanced diet. since no single food item can supply the body with everything it needs, it is important to eat a variety of foods. so to maintain a long, happy life, get out there and get moving, and enjoy a wide range of healthy meals. which statement best describes the mistake the writer makes in this paragraph?