Animals (and humans) eat plants and meat (both of which contain carbon), and breathe the air, which contains a mixture of oxygen and carbon dioxide.
(Animals (and humans; eat; plants and meat (both of which contain carbon)) (plants and meat; contain; carbon) (Animals (and humans; breathe; the air, which contains a mixture of oxygen and carbon dioxide) (the air; contains; a mixture of oxygen and carbon dioxide)
Animals (and humans plants and meat Animals (and humans the air
eat contain breathe contains
plants and meat (both of which contain carbon)
carbon
the air, which contains a mixture of oxygen and carbon dioxide
a mixture of oxygen and carbon dioxide