For people with COPD (Chronic Obstructive Pulmonary Disease), the activity that might be easiest is "reading."
Grocery shopping, walking to the mailbox, and climbing stairs can require more physical exertion and may lead to shortness of breath, which individuals with COPD often experience. Reading, on the other hand, is a stationary activity that requires minimal physical effort and can be done at a comfortable pace, making it more manageable for someone with COPD.