**Core Concept**
The comparison of fat content between cow's milk and buffalo milk is a critical aspect of dairy nutrition. Buffalo milk generally has a higher fat content compared to cow's milk due to its distinct nutritional profile. This difference in fat content affects the nutritional value and culinary uses of these two types of milk.

**Why the Correct Answer is Right**
Buffalo milk contains approximately 7-8% fat, whereas cow's milk contains around 3.5-4% fat. This higher fat content in buffalo milk is attributed to the larger fat globules present in the milk, which contribute to its rich and creamy texture. The increased fat content in buffalo milk also provides more calories and energy compared to cow's milk, making it a popular choice for various dairy products.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because buffalo milk is known for its higher fat content, not lower.
**Option B:** This option is incorrect because the fat content in buffalo milk is not comparable to human milk, which has a relatively low fat content.
**Option C:** This option is incorrect because the fat content in buffalo milk is not significantly different from that in goat's milk, which can vary depending on factors like breed and diet.

**Clinical Pearl / High-Yield Fact**
A key difference between cow's milk and buffalo milk is their fat globule size. Buffalo milk contains larger fat globules, which contribute to its rich and creamy texture. This characteristic makes buffalo milk an excellent choice for cheese production and other dairy products.

**Correct Answer:** D