Final answer:
Military households fulfill their duties and obligations to maintain stability in feudal Japan by contributing to defense, loyalty, and hierarchical structure.
Step-by-step explanation:
According to Shogun Hidetada, military households fulfilling their duties and obligations in feudal Japan were of great importance in maintaining stability. These households played a crucial role in maintaining order, upholding the social structure, and contributing to the defense of the realm, loyalty to the shogunate, and adherence to the hierarchical structure of society. They were responsible for the overall stability of the feudal system. Therefore, the correct answer is option 4) All of the above.