Question no 19 ..
Dear Student
Oxygen dissolves into water from two sources: the atmosphere and from plants in the water. The primary source of oxygen for a pond is from microscopic algae (phytoplankton) or submerged plants. In the presence of sunlight, these produceoxygen through photosynthesis and release this oxygen into the pond water.
So we can increase water by planting water grass.
Correct option is A.
Regards
Oxygen dissolves into water from two sources: the atmosphere and from plants in the water. The primary source of oxygen for a pond is from microscopic algae (phytoplankton) or submerged plants. In the presence of sunlight, these produceoxygen through photosynthesis and release this oxygen into the pond water.
So we can increase water by planting water grass.
Correct option is A.
Regards