Question

when a thrombus moves to another site and becomes lodged there, the thrombus is called: an infarct an embolus a bolus a thrombosis an aneurysm

Explanation:

An infarct is tissue death due to lack of blood supply. A bolus is a mass of food in the digestive system. Thrombosis is the formation of a thrombus. An aneurysm is a bulge in a blood vessel. An embolus is a thrombus (or other material) that has moved and become lodged.

Answer:

an embolus