Final answer:
There is no universally standardized color for bonds in molecular models; it depends on the conventions used in the educational materials. Colors like yellow, green, blue, or red could all potentially be used to represent different atoms or bonds, but without a specific convention, it's impossible to give a definitive answer.
Step-by-step explanation:
The color usually chosen for representing bonds between particles in molecular models can vary depending on the conventions used by the textbook, course, or software. However, there is no standardized color that universally represents bonds between particles such as those in sodium acetate (NaC₂H₃O₂). In some molecular visualization systems, colors like yellow, green, blue, or red could be arbitrarily chosen to represent different types of atoms or bonds, but this is a matter of convention rather than a reflection of the physical properties of the molecule.
For example, crystal lattice structures may use blue balls to represent sodium ions and green balls for chloride ions, according to a figure from Wikimedia Commons. However, in the context of your question, without a specific color-coding convention provided, it is impossible to definitively say which color corresponds to the bonds in NaC₂H₃O₂. Therefore, any choice from options A to D would be based on the particular convention being used, which should be indicated in your educational materials.