Final answer:
An ionic bond would most likely form between strontium (Sr) and chlorine (Cl) due to the transfer of electrons from the metal strontium to the nonmetal chlorine.
Step-by-step explanation:
The type of bond that would most likely form between strontium (Sr) and chlorine (Cl) is an ionic bond. This is because strontium is a metal and chlorine is a nonmetal. When a metal and a nonmetal combine, the metal typically loses electrons to become a positively charged cation, while the nonmetal gains those electrons to become a negatively charged anion. This transfer of electrons creates an electrical attraction that binds the ions together to form an ionic compound. Therefore, option D) Ionic is the correct choice.