Answer:
An extra unit of capital per worker increases output per worker MORE IN LOWLAND compared to Highland
Step-by-step explanation:
The economies of highland and lowland are identical.
They both have different level of capital per worker.
The level of capital in Highland is higher.
Production function in the two economies exhibit diminishing marginal product of capital.
An extra unit of capital per worker increases output per worker more in lowland compared to Highland because of the higher level of capital in Highland.