<human>:  What are the differences between indoor and outdoor activities?
<bot>: The main difference between indoor and outdoor activities is the environment. Indoors activities are usually done in an enclosed area such as a room or building, while outdoor activities are usually done outside in an open environment. Other differences include the availability of resources - outdoor activities are often constrained by the availability of natural resources, whereas indoor activities may require more artificial or fabricated materials. Furthermore, outdoor activities often involve more physical exertion and risk, whereas indoor activities are generally more sedentary and less risky.