Which of the following conditions is linked to a lack of blood supply to tissues?

The condition linked to a lack of blood supply to tissues is ischemia. Ischemia occurs when there is insufficient blood flow, which leads to a deficiency in oxygen and nutrients that are essential for cellular function. This inadequate blood supply can result from various factors, such as blockages in blood vessels, arterial constriction, or severe blood loss.

In contrast, hypertension refers to high blood pressure, which is a separate issue related to the force of blood against the walls of the arteries rather than a lack of blood supply. Hyperemia involves an increased blood flow to a particular area, often in response to inflammation or increased metabolic activity, which is the opposite of what occurs in ischemia. Edema is the accumulation of fluid in tissues, which may happen due to various reasons, including inflammation or heart failure, and does not specifically indicate a lack of blood supply. Thus, ischemia is uniquely characterized by reduced blood flow, leading to potential tissue damage and necrosis if not addressed promptly.