The correct choice is option (B). An ecosystem is generally described as a biological community consisting of living organisms that interact with their environment to thrive. Various factors, including rainfall, temperature, and elevation, dictate the specific ecosystem type. Ecosystems rely on two primary processes: nutrient recycling and energy flow. Nutrients like carbon, iron, and sulfur are drawn from organisms and plants, with decomposers replenishing these nutrients in the soil, allowing plants to use them before they are transferred to consumers. Simultaneously, energy is converted from one form to another, with about 10% of it transitioning between trophic levels, while the rest dissipates into the environment. These dual processes continuously operate together, facilitating recycling and utilization.
