What is the correct way to use utensils while eating?

Using the knife to push food onto the fork without cutting is an appropriate and polite way to handle utensils while eating. This technique aids in managing food effectively, particularly when navigating the proper etiquette associated with formal dining. It allows for a clean and efficient transfer of food from the plate to the fork, which is especially useful when the food is served on larger platters or when utensils may not be utilized for cutting.

This method demonstrates good table manners by avoiding unnecessary noise that may be created by cutting food while the knife is used solely for positioning food. It exemplifies a level of decorum that reflects an understanding of dining etiquette, which is valuable in both social and professional settings.

The other options do not adhere to established dining etiquette. For instance, using utensils only for the main course can lead to inappropriate handling during other parts of the meal, such as the appetizer or dessert. Alternating hands for different courses may create confusion and disrupt the flow of dining, while keeping utensils in one hand at all times can hinder the ability to manage different courses effectively and may appear awkward. Thus, option D stands out as the correct and most respectful method for using utensils during a meal.