A table accompaniment is an item that is placed on a dining table to accompany or complement a meal. Out of the options provided, the table accompaniment is the milk jug. A milk jug is a small container that is typically used to hold and pour milk to be added to tea or coffee. It's often provided as an accompaniment to breakfast or brunch meals.
A port glass is a type of wine glass that is used to serve port wine, which is a dessert wine. An ashtray is used to hold ash and cigarette butts for smokers. A fish fork is a type of fork that is designed with a shorter and wider tine to make it easier to separate the flesh of fish from its bones. However, while a fish fork can be used to complement a fish dish, it is not considered a table accompaniment as it is typically part of the table setting.