Final answer:
The pair of qualities associated with the concept of repose in interior design are strength and dignity, which promote a sense of calmness and balance in a space.
Step-by-step explanation:
The pair of qualities associated with the concept of repose in interior design are strength and dignity. Repose in interior design refers to creating a sense of calmness, tranquility, and balance in a space. This is achieved through the use of strong and dignified design elements, such as solid furniture, symmetrical arrangements, and timeless colors.