Is the foot part of the metric system?
The metric system measures distance based on the meter unit. The foot is part of the American standard system of measurement.
The answer is no.

Has spinach been a source of power in a comic movie?
The comic character Popeye uses spinach as a source of power. A movie was made about Popeye. Popeye consumes spinach as a source of power in the movie.
The answer is yes.

Did Columbus obtain his funding from the rulers of the Portugese Empire?
King Ferdinand and Queen Isabella funded Columbus' voyage to the New World. King Ferdinand of Argon and Queen Isabella of Castille were the joint rulers of kingdoms of the Iberian Peninsula, which included modern-day Spain but excludes Portugal. King John II of Portugal rejected Columbus' request for funding.
The answer is no.

Would Republic of Korea Navy dominate Eritrea navy?
The Republic of Korea Navy has 150 ships, 70 aircraft, 70,000 personnel including 29,000 marines . The Eritrean Navy has 4 ships and an army of 45,000.
The answer is yes.