Algae is reduced because the duckweed prevents sunlight from reaching the water, partially cutting off photosynthesis and major oxygen production.
(Algae; is reduced; because the duckweed prevents sunlight from reaching the water, partially cutting off photosynthesis and major oxygen production) (the duckweed; prevents; sunlight; from reaching the water, partially cutting off photosynthesis and major oxygen production) (sunlight; from reaching; the water)
Algae the duckweed sunlight
is reduced prevents from reaching
because the duckweed prevents sunlight from reaching the water, partially cutting off photosynthesis and major oxygen production
sunlight from reaching the water, partially cutting off photosynthesis and major oxygen production
the water