Final answer:
According to Article II, Section 3 of the United States Constitution, it is the President's responsibility to ensure that 'laws be faithfully executed'.
Step-by-step explanation:
The individual that the Constitution entrusts with the responsibility of ensuring that the 'laws be faithfully executed' is the President. This responsibility is outlined explicitly in Article II, Section 3 of the United States Constitution, often referred to as the 'take care clause'. This clause is the basis for the President's executive power, which includes the enforcement of federal laws, supervision of executive branch of government, and conduct of relations with foreign countries.
Learn more about President's duties