They are the only things on the earth that can make food from sunlight, water, and carbon dioxide.
(They; are; the only things on the earth that can make food from sunlight, water, and carbon dioxide) (the only things on the earth; can make; food; from sunlight, water, and carbon dioxide)
They the only things on the earth
are can make
the only things on the earth that can make food from sunlight, water, and carbon dioxide
food from sunlight, water, and carbon dioxide