Which type of stroke is characterized by a blockage in the brain?

The answer is correct because an ischemic cerebrovascular accident, commonly referred to as an ischemic stroke, occurs when there is a blockage in a blood vessel supplying blood to the brain. This blockage can result from various causes, such as blood clots or plaque buildup in the arteries, leading to reduced blood flow and oxygen deprivation to the brain tissue, which can cause brain cells to die.

This is different from hemorrhagic strokes, where there is bleeding into or around the brain due to a ruptured blood vessel, leading to increased pressure and potential damage to brain tissue. Transient ischemic attacks are often referred to as "mini-strokes" and involve temporary blockages that resolve quickly without causing permanent damage. A cerebral aneurysm is a bulging area in a weakened blood vessel that can lead to hemorrhage but is not characterized by a blockage. Thus, the defining characteristic of an ischemic stroke is indeed the blockage, making it the correct choice.