Which of the types of dietary fat is known to elevate blood cholesterol levels?

Dietary fats that are bad for the health are Saturated fat and Trans fat.

There are four main types of fat found in food are monounsaturated fat, polyunsaturated fat, saturated fat, and trans fat. Most foods have a different balance of these types of fats, but are usually classified by the type of fat they are highest in.

Saturated fat is also called "animal fat" because it is found in foods that originally come from animals. Saturated fats are known to increase LDL ("bad") cholesterol.

Trans fat is formed when liquid oils are made into solid fats. Trans fats are artificially produced by food manufacturers. They were originally thought to be the healthier option to replace saturated fats. However, recent medical findings have discovered that trans fats are not healthier. Trans fats increase LDL ("bad") cholesterol and decrease HDL ("healthy") cholesterol.

Eating foods that contain cholesterol can raise your cholesterol
Animal products- meats, milk, cheese, butter, eggs , shellfish, contain cholesterol as well as saturated fats which are digested and processed in your body and can be made into cholesterol.

Trans fats are not good. Trans fats are created in industry to make plant oils more solid. Solid shortening is plant oil that has been hydrogenated, making it more saturated like animal fats.

stuff like butter where you can see the fat is hard raise your colestrol things with runny fat where you can't see it like fish is good fat and it lowers your colestrol.