The sentence that contains an element of bias is:
"Most fruits and vegetables are low in calories, making them a healthy and delicious part of any diet."
This statement implies that because fruits and vegetables are low in calories, they are inherently healthy and delicious, which introduces a subjective perspective on what constitutes "healthy" and "delicious." Additionally, it emphasizes a positive view of fruits and vegetables without acknowledging any potential downsides or alternatives, which reflects a biased viewpoint.