What type of stroke is characterized by symptoms that resolve within 24 hours?

The type of stroke characterized by symptoms that resolve within 24 hours is known as a Transient Ischemic Attack (TIA). A TIA occurs when there is a temporary decrease in blood supply to a part of the brain, leading to stroke-like symptoms. However, these symptoms are temporary and typically resolve completely within a short period, usually less than 24 hours, which distinguishes TIAs from other types of strokes.

In contrast, an ischemic stroke involves a prolonged blockage of blood flow to the brain, leading to permanent neurological damage if not treated promptly. A hemorrhagic stroke is caused by bleeding in or around the brain and typically results in symptoms that do not resolve quickly. The term "acute stroke" is a general term that includes both ischemic and hemorrhagic strokes and does not specify the transient nature of the symptoms. Therefore, the defining feature of a TIA is the rapid resolution of symptoms, making it the correct answer in this context.