Which pair is correct?

Options

A. Sweat = temperature regulation
B. Saliva = sense of food taste
C. Sebum = sexual attraction
D. Humeus = Hind leg

Answer

To solve the question "Which pair is correct?", we need to analyze each option provided:

### Step-by-Step Solution:

1. **Option A: Sweat equals to temperature regulation**
- Sweat is produced by sweat glands in the skin and helps in cooling the body through evaporation. When sweat evaporates, it takes heat away from the body, thus regulating body temperature.
- **Conclusion**: This pair is correct.

2. **Option B: Saliva, sense of food taste**
- Saliva is produced by salivary glands and plays a role in digestion by moistening food and containing enzymes like amylase. However, the sense of taste is primarily detected by taste buds on the tongue, not by saliva itself.
- **Conclusion**: This pair is incorrect.

3. **Option C: Semen, sexual attraction**
- Semen is the fluid that contains sperm and is involved in reproduction. While it plays a role in reproduction, sexual attraction is influenced by a variety of factors including pheromones and psychological aspects, not solely by semen.
- **Conclusion**: This pair is incorrect.

4. **Option D: Humerus, hind leg**
- The humerus is a bone located in the upper arm of humans and many other animals. It is not related to the hind leg, which would involve bones like the femur or tibia in quadrupeds.
- **Conclusion**: This pair is incorrect.

### Final Answer:
After analyzing all the options, the only correct pair is:
- **Option A: Sweat equals to temperature regulation.**