Plants maintain homeostasis by exchanging gas through their stomata (option B). Details about homeostasis can be found below.
Homeostasis is the ability of a system or living organism to adjust its internal environment to maintain a constant state.
Plants maintain homeostasis in their cell by opening a pore called stomata for gaseous exchange to occur i.e. loss of oxygen, intake of carbon dioxide
Therefore, plants maintain homeostasis by exchanging gas through their stomata.
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