Explanation:
Reading a book is not a physical activity because it does not involve any significant movement or exercise of the body. It is a sedentary activity that mainly engages the mind rather than the body.

Dancing:
Dancing is a physical activity that involves movement of the body in rhythm to music. It requires coordination, flexibility, and stamina, making it a great form of exercise. Dancing can be aerobic, helping to improve cardiovascular health, and it also helps to tone muscles and improve overall body strength.

Gardening:
Gardening is a physical activity that involves various tasks such as digging, planting, weeding, watering, and pruning. These activities require physical exertion and can contribute to overall fitness. Gardening helps in burning calories, improving flexibility and strength, and also provides exposure to fresh air and sunlight, benefiting both physical and mental well-being.

Domestic work:
Domestic work includes household chores such as cleaning, cooking, washing dishes, and doing laundry. These activities involve physical movement and can be considered as light to moderate exercise. Domestic work helps in burning calories and contributes to overall physical fitness. It also improves dexterity and can be a productive way to stay active at home.

Reading a book:
Reading a book is a sedentary activity that does not involve physical movement or exercise. It primarily engages the mind and is a mental activity rather than a physical one. While reading can be intellectually stimulating and beneficial for mental well-being, it does not provide any physical fitness benefits unless combined with other activities like walking on a treadmill or using a stationary bike.