this is the area that has most food and most oxygen, made by the plants from sunlight and carbon dioxide (this is called photosynthesis).
(this; is; the area that has most food and most oxygen,) (the area; has; most food and most oxygen) (this; is called; photosynthesis)
this the area this
is has is called
the area that has most food and most oxygen,
most food and most oxygen
photosynthesis