Final answer:
The Marine Corps core values that guide personal conduct and decision-making are Honor, Courage, and Commitment.
Step-by-step explanation:
The Marine Corps core values that give us strength to do what is right in every situation in adherence to high standards of personal conduct are Honor, Courage, and Commitment. This set of values is instrumental in shaping the personal behavior and decision-making process of Marines, ensuring that their actions align with the esteemed virtues of the military institution. These core values are ingrained during basic training and continue to guide Marines throughout their service, fostering a culture of ethical behavior, resilience, and dedication to the mission and to one another.