Which term describes a method that absorbs and retains resources with minimal waste?

Efficiency is the term that describes a method which absorbs and retains resources with minimal waste. In the context of aquaculture and resource management, efficiency emphasizes the optimization of resource use, ensuring that inputs such as feed, water, and energy are utilized to their fullest potential while minimizing losses or waste. This approach not only maximizes productivity but also contributes to sustainable practices that are increasingly essential in aquaculture operations.

In contrast, conservation refers to the practice of safeguarding resources to prevent their depletion, but it doesn't inherently focus on the optimization of resource use. Exploitation implies using resources indiscriminately, often leading to overuse or depletion, which is contrary to the goal of efficiency. Depletion suggests a reduction in the availability of resources due to overuse or mismanagement, which also does not align with the concept of retaining resources effectively. Thus, efficiency specifically highlights the importance of maximizing outcomes while minimizing waste, making it the appropriate choice for the question.