What role do vitamins play in the body?

Vitamins play crucial roles in various bodily functions, making option B the correct answer. They are organic compounds that are needed in small quantities for a range of physiological functions. Specifically, vitamins are involved in metabolic processes, helping the body convert food into energy and ensuring that various biochemical reactions occur efficiently.

Additionally, vitamins are vital for the immune system, supporting the body in fighting infections and maintaining overall health. Each vitamin has a specific function; for example, Vitamin C aids in collagen formation and immune health, while B vitamins are integral to energy production and synthesis of neurotransmitters.

By participating in a wide array of functions, vitamins support the maintenance of health rather than just playing a role in physical performance or providing energy directly. This distinguishes them from macronutrients such as carbohydrates and proteins, which do provide energy and contribute to muscle performance. Understanding the multifaceted roles of vitamins emphasizes their importance in a balanced diet and overall well-being.