The maintenance of internal favourable conditions, by a self-regulated mechanisms in spite of the fact that there are changes in environment, is known as

Options

A. Homeostasis
B. Entropy
C. Enthalpy
D. Steady state

Answer

To solve the question, "The maintenance of internal favourable conditions, by a self-regulated mechanism in spite of the fact that there are changes in the environment, is known as," we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question describes a process that maintains stable internal conditions despite external changes. This concept is crucial in biology, particularly in understanding how organisms survive in varying environments.

2. **Analyzing the Options**:
- The options given are:
- A) Homeostasis
- B) Entropy
- C) Enthalpy
- D) Steady State

3. **Evaluating Each Option**:
- **A) Homeostasis**:
- Homeostasis refers to the ability of an organism to regulate its internal environment to maintain stable, constant conditions (e.g., temperature, pH) despite changes in the external environment. This is a self-regulating process.
- **B) Entropy**:
- Entropy is a concept from thermodynamics that measures the disorder or randomness in a system. It does not relate to the maintenance of stable internal conditions.
- **C) Enthalpy**:
- Enthalpy refers to the total heat content of a system and is related to heat changes during chemical reactions. It is not concerned with internal regulation.
- **D) Steady State**:
- Steady state refers to a condition where certain variables remain constant over time. While it can be related to homeostasis, it is more specific to cellular levels and does not encompass the entire organism's regulation.

4. **Conclusion**:
- Based on the definitions and explanations of each term, the correct answer is **A) Homeostasis**. Homeostasis is the term that best fits the description of maintaining internal favourable conditions through self-regulated mechanisms.

### Final Answer:
**Homeostasis**