Answer
(c)
Work Step by Step
Energy subsidy refers to the ratio of energy obtained from a product to the energy input required to produce that product. In this case, $10,000$ kg of cattle is produced using $50$ acres of corn as feed, and each acre produces $4,000$ kg of corn. So, the energy subsidy is calculated as follows:
$\text{Energy subsidy} = \frac{\text{Energy obtained from cattle}}{\text{Energy input from corn}}$
$\text{Energy subsidy} = \frac{50\cdot 4000}{10000}=20.$
The answer is (c).
