Final answer:
LDL is considered bad cholesterol as it carries cholesterol and can contribute to plaque buildup in the arteries.
Step-by-step explanation:
Low-density lipoproteins (LDL) are considered as the "bad cholesterol." LDLs carry cholesterol from the liver to other tissues and can contribute to the buildup of plaque in the arteries. In contrast, high-density lipoproteins (HDL) are referred to as "good cholesterol" as they collect cholesterol from other tissues and return it to the liver.