**The Strategy of Scientists**

The correct answer to the question is option A: "Focus first on the essential features of a phenomenon and remove its less significant aspects." This strategy is commonly followed by scientists in their research and investigation processes. Let's delve into the details of this strategy and understand why it is the preferred approach.

**Removing Less Significant Aspects**

One of the key aspects of scientific research is to identify and understand the essential features of a phenomenon. This involves carefully studying the subject matter and identifying the core components that contribute to its overall functioning or behavior. By focusing on the essential features, scientists can gain a deeper understanding of the phenomenon and its underlying principles.

In order to isolate and analyze these essential features, scientists often find it necessary to remove or disregard the less significant aspects. This is done to simplify the problem and make it more manageable. By eliminating the less significant aspects, scientists can reduce the complexity of the phenomenon and focus their attention on the crucial elements that are most relevant to their investigation.

**Importance of Essential Features**

By focusing on the essential features of a phenomenon, scientists can gain valuable insights and develop a deeper understanding of its underlying mechanisms or principles. These essential features often hold the key to unraveling the mysteries or complexities associated with the phenomenon. By honing in on these crucial elements, scientists can formulate hypotheses, develop experiments, and make observations that can help them uncover the underlying truths or patterns.

**Gradual Expansion of Understanding**

Once scientists have a solid grasp of the essential features of a phenomenon, they may then choose to gradually expand their understanding by incorporating the less significant aspects. This is typically done in a systematic and controlled manner, ensuring that each additional aspect is carefully studied and analyzed.

By following this strategy, scientists can build upon their initial understanding and develop more comprehensive and nuanced theories. This gradual expansion allows for a more holistic and complete understanding of the phenomenon, while also ensuring that the core elements are not overshadowed or overlooked.

**Conclusion**

In conclusion, the strategy of scientists is to focus first on the essential features of a phenomenon and remove its less significant aspects. This approach allows scientists to gain a deeper understanding of the subject matter and develop more comprehensive theories. By isolating and analyzing the crucial elements, scientists can uncover the underlying principles and mechanisms that govern the phenomenon. Gradually incorporating the less significant aspects further expands their understanding, ensuring a balanced and thorough investigation.

A