Explanation:

Key Points:
- An active partner takes part in the business of the firm.
- They are actively involved in the day-to-day operations and decision-making process.
- Active partners contribute their skills, knowledge, and efforts to the success of the business.
- They may have specific responsibilities or roles within the firm.
- Active partners actively share the profits of the business based on their ownership or partnership agreement.
Example:
Let's say there is a partnership firm that operates a restaurant. The active partners in this case would be those who are actively involved in running the restaurant. They may be responsible for tasks such as managing the staff, overseeing the kitchen operations, handling customer relations, and making financial decisions. These active partners actively contribute their time, skills, and efforts to ensure the success of the restaurant and share the profits based on their partnership agreement.
Therefore, option A is the correct answer as it accurately defines an active partner as someone who takes part in the business of the firm.

Understanding Active Partners in a Partnership Firm
In the context of a partnership, the term "active partner" refers specifically to an individual who plays a significant role in the daily operations and management of the business. Here's a detailed explanation:

Definition of an Active Partner
- An active partner is someone who is directly involved in the day-to-day activities of the firm. This includes making important decisions, managing operations, and overseeing the workforce.
- They contribute their skills, expertise, and time to ensure the business functions smoothly and efficiently.

Key Characteristics of Active Partners
- **Participation in Business Operations:** They engage in various business activities such as marketing, accounting, and customer service. This active involvement helps in driving the business forward.
- **Decision-Making Role:** Active partners often have a say in strategic planning and operational decisions, influencing the direction of the firm.
- **Liability and Responsibility:** They assume a higher level of responsibility and liability compared to silent or dormant partners, who do not engage in daily operations.

Comparison with Other Types of Partners
- **Silent/Dormant Partners:** Unlike active partners, silent partners invest capital but do not participate in management or operations.
- **Limited Partners:** These partners have limited involvement and liability, primarily focusing on their financial investment rather than operational duties.

Conclusion
In conclusion, an active partner is integral to the firm's success, as they are directly involved in its operations and decision-making processes. Their engagement ensures the firm runs effectively and remains competitive in the market. Understanding this role is crucial for anyone studying partnership structures in business.