In Shakespeare's play "Hamlet," Reynaldo is a servant of Polonius, who is the Lord Chamberlain of King Claudius' court. As a servant, Reynaldo is obligated to follow Polonius' instructions because of the social hierarchy and power dynamics of the time period.
In the feudal society depicted in the play, servants and lower-class individuals were expected to be obedient and subservient to their superiors. This meant that they had to follow their instructions without question and carry out their duties to the best of their abilities. As a servant, Reynaldo has no power or authority of his own and is entirely dependent on Polonius for his livelihood and social standing.
Moreover, Polonius has a position of power and influence at court, and Reynaldo is likely aware of the consequences of not following his instructions. Polonius could punish Reynaldo for insubordination, and this could lead to the loss of his job and a significant drop in his social standing. Additionally, Polonius could spread rumors about Reynaldo's behavior, which would damage his reputation and make it difficult for him to find work elsewhere.
In conclusion, Reynaldo is obligated to follow Polonius' instructions in "Hamlet" due to the social and power dynamics of the time period. As a servant, he has no authority of his own and is dependent on his master for his livelihood and social standing. Failure to follow Polonius' instructions could result in punishment, the loss of his job, and damage to his reputation.