Final answer:
Strokes are primarily caused by either a blood clot blocking blood flow, known as an ischemic stroke, or by bleeding from a broken blood vessel in the brain, called a hemorrhagic stroke. Immediate medical intervention is critical for treatment.
option (c) is the most accurate answer.
Step-by-step explanation:
Strokes are often caused by a blood clot or bleeding in the brain. A stroke, also known as a cerebrovascular accident or brain attack, occurs when blocked or broken arteries in the brain lead to the death of brain cells. There are two main types of stroke: ischemic stroke and hemorrhagic stroke. An ischemic stroke happens when blood flow to an area of the brain is obstructed by a blockage, which is frequently due to a blood clot or fat deposit. This interruption of blood flow causes a lack of oxygen to the brain, resulting in the death of neurons and various symptoms depending on the area affected. A hemorrhagic stroke, on the other hand, is due to bleeding from a broken blood vessel in the brain, which can cause pressure and damage to the brain tissue.
Risk factors for stroke include high blood pressure, diabetes, high cholesterol, and a family history of stroke. Immediate medical attention is critical when stroke symptoms are present, as timely treatment can significantly reduce the damage to the brain.