Final answer:
The two pieces of furniture that utilize horizontal lines are the Bookshelf and the Dining table, which have horizontal shelves and a flat horizontal surface, respectively.
Step-by-step explanation:
The student is asking to identify two pieces of furniture that utilize horizontal lines. The correct answers are A) Bookshelf and D) Dining table. A bookshelf typically features a series of horizontal shelves that are used to store books, items, or display decorations.
A dining table's surface is also primarily horizontal, providing a flat area for placing dishes and eating meals. An armoire and a tall dresser, on the other hand, are characterized more by their vertical elements and are therefore not the best examples of furniture with horizontal lines.