Final answer:
Strokes may be caused by a thrombus, an aneurysm, or an embolus.
Step-by-step explanation:
Strokes may be caused by a thrombus, which is a blood clot that forms in a blood vessel in the brain or neck. An aneurysm, which is a weak spot in the wall of a blood vessel, can also lead to a stroke if it bursts. Additionally, an embolus, which is a blood clot or another foreign substance that travels through the bloodstream and blocks a blood vessel in the brain, can cause a stroke.
Learn more about Causes of strokes