## **Core Concept**
Human milk and cow's milk have different compositions, reflecting the nutritional needs of infants of different species. Human milk is specifically tailored to meet the growth and developmental requirements of human infants, with unique characteristics that distinguish it from cow's milk.

## **Why the Correct Answer is Right**
Human milk contains a higher concentration of **lactose** compared to cow's milk. This is because human infants have a higher energy requirement for brain growth and development. The lactose content in human milk supports this need, providing a readily available source of energy. Additionally, human milk contains **oligosaccharides**, which are complex carbohydrates that serve as prebiotics, promoting the growth of beneficial gut flora.

## **Why Each Wrong Option is Incorrect**
- **Option A:** While human milk does contain proteins, the protein content in cow's milk is actually higher. However, the types of proteins and their digestibility differ significantly between the two.
- **Option B:** Cow's milk generally contains more **calcium** than human milk. The calcium in cow's milk is also in a form that is less easily absorbed by the human infant compared to the calcium in human milk.
- **Option D:** Human milk and cow's milk both contain **fats**, but the composition and type of fatty acids differ. Cow's milk may have a different fatty acid profile, but saying it has "more" fat is not generally accurate without context.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **human milk contains higher levels of lactose and specific oligosaccharides** compared to cow's milk. This is crucial for supporting the growth and development of human infants, particularly brain development and gut health.

## **Correct Answer:** .