Final answer:
A bi-directional pattern is correctly referred to as a bidirectional pattern, which is a type of pattern that repeats in two opposite directions, often creating balance in artworks.
Step-by-step explanation:
The term bi-directional pattern is used to describe a pattern that repeats in two opposite directions. In the context of pattern types, the correct answer to the question is (2) Bidirectional pattern. A bidirectional pattern is often seen in various forms of art and design, where motifs or elements face or move in two different directions. This can create a sense of balance and rhythm within the piece. Unlike unidirectional patterns, which move in a single direction, or omnidirectional patterns, which extend in all directions, bidirectional patterns specifically have two distinct directions of repetition or symmetry.