Which of the following is NOT a primary component of fish feed?

The correct choice is B, alcohols, as they are not a primary component of fish feed. Fish feed is typically formulated to contain essential nutrients to support the growth and health of fish. The primary components of fish feed include proteins, carbohydrates, and vitamins.

Proteins are crucial because they provide the necessary amino acids needed for growth, tissue repair, and overall health. Fish rely on proteins for muscle development and various metabolic functions.

Carbohydrates serve as a source of energy for fish, aiding in maintaining energy levels for daily activities and metabolic processes. They can also improve the texture and processing properties of the feed.

Vitamins play a vital role in various biological functions, including immune response, reproduction, and disease resistance. They help in ensuring the overall well-being of the fish.

In contrast, alcohols do not contribute any nutritional value to fish feed and are not suitable for consumption by fish. Therefore, identifying alcohols as not a primary component clarifies the essential nature of the other stated nutrients in developing effective and health-promoting fish diets.