Step 1: Understanding the Concept:
Enzymes are used as feed additives.
They improve nutrient utilization.
Step 2: Key Formula or Approach:
No specific formula.
Need to know enzyme functions.
Step 3: Detailed Explanation:
\(\beta\)-glucanase is used to degrade structural polysaccharides.
It breaks down \(\beta\)-glucans in cereals.
Phytase degrades phytic acid.
Protease degrades proteins.
Lipase degrades fats.
Thus, \(\beta\)-glucanase is correct.
Step 4: Final Answer:
\(\beta\)-glucanase is used to degrade structural polysaccharides.
Hence, the correct option is (C).