Which statement is true about algae in a pond?

The statement that algae release oxygen for aerobic bacteria during the daytime is accurate and reflects a fundamental process of photosynthesis. During the day, when there is sunlight, algae utilize that light energy to convert carbon dioxide and water into glucose and oxygen. This process not only benefits the algae themselves by providing energy for growth but also contributes oxygen to the water, which is essential for aerobic bacteria and other aquatic organisms.

The presence of oxygen is crucial in aquatic ecosystems, as it supports the survival of fish and other aerobic life forms. This dynamic highlights the important role of algae in maintaining the ecological balance within a pond, as they contribute to the oxygen levels, especially during daylight hours when photosynthesis is at its peak.