Answer:
It produces food more efficiently than Japan.
Step-by-step explanation:
Given that an ABSOLUTE ADVANTAGE is when a country or company can produce the same quantity of goods more efficiently than another country or company with lesser input or produce more quantities of goods with more efficiently with the same input.
Hence, in this case, when it is said that the United States has an absolute advantage in producing food compared with Japan, it means that "It produces food more efficiently than Japan."