Final answer:
Photosensitivity is the term for an increased susceptibility to sunlight with the danger of intense sunburn.
Step-by-step explanation:
The term for an increased susceptibility to sunlight with the danger of intense sunburn is photosensitivity. Photosensitivity occurs when the skin becomes more sensitive to UV radiation, resulting in a higher risk of sunburn and skin damage. It can be caused by certain medications, medical conditions, or genetic factors.