Zach eats a high-fat diet. when he decides to improve his diet to protect his heart health, which type of fats should he be particularly careful to avoid?

The correct answer is -  trans fat.

Explanation:

Trans fat is a type of unsaturated fats that come with many negative health effects in the human body. The trans fat increases the LDL which is considered as bad cholesterol and lower the HDL or good cholesterol in the body, which can cause a number of heart diseases.

Trans fat also increases the chance of developing type 2 diabetes in an individual. Trans fat should be avoided by the Zach.

Thus, the correct answer is - Trans fat.

i think the answer would be b.