Step 1: Understanding the Question:
This question tests knowledge of fodder production systems.
Step 2: Detailed Explanation:
A protein bank is the production of fodder from trees, shrubs, and grasses by lopping and pruning.
It provides high-protein fodder for livestock.
Home garden (B): Not primarily for fodder.
Shelter belt (C): For wind protection.
Block plantation (D): For timber production.
Thus, the correct answer is protein bank.
Step 3: Final Answer:
Thus, fodder production by lopping is called a protein bank, which corresponds to option (A).
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