Plants sing as they work The sun is the primary source in the Earth's food and energy chain.
(Plants; sing; T:as they work The sun is the primary source in the Earth's food and energy chain) (they; work; ) (The sun; is; the primary source in the Earth's food and energy chain)
Plants they The sun
sing work is
T:as they work The sun is the primary source in the Earth's food and energy chain
the primary source in the Earth's food and energy chain