The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Glaucus/The Wonders of the Shore by Charles Kingsley: and was therefore a vegetable.
In 1850, Mr. Robert Warrington communicated to the Chemical Society
the results of a year's experiments, "On the Adjustment of the
Relations between the Animal and Vegetable Kingdoms, by which the
Vital Functions of both are permanently maintained." The law which
his experiments verified was the same as that on which Mr. Ward, in
1842, founded his invaluable proposal for increasing the purity of
the air in large towns, by planting trees and cultivating flowers
in rooms, THAT THE ANIMAL AND VEGETABLE RESPIRATIONS MIGHT
COUNTERBALANCE EACH OTHER; the animal's blood being purified by the
oxygen given off by the plants, the plants fed by the carbonic acid
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