Lyme disease is characterized by a(n) that forms at the site of infection.

Lyme disease is characterized by a red rash called erythema migrans at the site of infection.

Explanation:

Lyme disease is caused by the bacterium Borrelia. It is a highly communicable disease, which spreads through the bite of infected tick in humans. At the site of the tick bite, a characteristic red expanding rash can be seen on the skin. This red rash is known as erythema migrans. Other symptoms of this disease include fever, fatigue and headache.

i think the answer would be d