Final answer:
Increasing physical activity and dietary changes including a reduction of saturated and trans fats and an increase in omega-3 fatty acids improve Bob's lipid profile. Eating trans fats would not be beneficial and would increase his risk of heart disease.
Step-by-step explanation:
To improve Bob's lipid profile and decrease his risk of heart disease, several lifestyle choices would be beneficial. Notably, increasing physical activity and making dietary modifications, such as reducing the intake of saturated and trans fats while increasing the consumption of omega-3 fatty acids, can lower total cholesterol and improve the LDL/HDL ratio.
These changes directly influence the balance of 'bad' low-density lipoproteins (LDL) and 'good' high-density lipoproteins (HDL), reducing the risk of plaque formation in arteries and subsequent heart disease. Maintaining an adequate HDL level is crucial, as it is involved in transporting excess cholesterol to the liver for recycling. On the contrary, consuming a diet high in trans fats would not improve his lipid profile or decrease his risk; in fact, it would likely deteriorate his cholesterol levels and elevate his heart disease risk.