Important part of fore brain which control body temperature urge for eating & drinking and has several group of neurosecretory cells is

Answer

**Step-by-Step Solution:**

1. **Identify the Forebrain Structure**: The question asks for an important part of the forebrain that controls body temperature, urges for eating and drinking, and contains several groups of neurosecretory cells.

2. **Recall the Functions of the Hypothalamus**: The hypothalamus is a crucial part of the forebrain that plays a significant role in maintaining homeostasis. It regulates various autonomic functions, including body temperature, hunger, and thirst.

3. **Link to Neurosecretory Cells**: The hypothalamus contains neurosecretory cells that produce hormones. These hormones are involved in regulating various physiological processes, including the secretion of hormones from the pituitary gland.

4. **Specific Functions**:
- **Body Temperature Regulation**: The anterior hypothalamic nucleus is involved in thermoregulation.
- **Hunger and Satiety**: The ventromedial nucleus of the hypothalamus is associated with the feeling of satiety and hunger.

5. **Conclusion**: Based on the functions and characteristics described, the important part of the forebrain that controls body temperature, urges for eating and drinking, and contains several groups of neurosecretory cells is the **hypothalamus**.

**Final Answer**: Hypothalamus

---