Final answer:
2nd degree burns exhibit blisters, redness, pain, swelling, and damage to both the epidermis and dermis, making 'All of the above' the correct answer.
Step-by-step explanation:
The characteristics of partial thickness 2nd degree burns include: 1) Blisters and redness, 2) Pain and swelling, and 3) Damage to both the epidermis and a portion of the dermis. Hence, the answer to the student's question is 4) All of the above. Second-degree burns are more severe than first-degree burns as they affect deeper layers of skin, leading to more intense pain and the formation of blisters. It is crucial to keep these burns clean and avoid infection for proper healing.