The figure described appears to represent a vector or a reaction in chemistry. Based on the options given:
- XZ−→− suggests a reaction or a vector pointing in the direction from X to Z.
- XZ←→ suggests a reversible reaction or vector representing equilibrium between X and Z.
- ZX−→− suggests a reaction or a vector pointing from Z to X.
- XZ¯¯¯¯¯¯¯¯ appears to represent a bond or interaction without directional arrows.
The correct response based on standard notation for directional vectors or reactions between two entities would likely depend on the context. However, if you are referring to a reversible reaction or a connection between two points, the most representative option would be:
XZ←→
This option indicates a bidirectional interaction between X and Z.