<span>Altruism is a selfless behavior so the animal would behave that way because it's intention is to put others before itself.
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The answer is Cutaneous Respiration. It is respiration through the surface of the skin. Cutaneous Respiration is used to supplement respiration alongside the use of their lungs. Cutaneous respiration<span> occurs primarily as a means of carbon dioxide exchange, with the majority of oxygen exchange occurring in the </span>lungs<span>. Frogs </span><span>take up most of their oxygen through </span>cutaneous respiration<span>, even if they possess </span>lungs<span>.</span>
By all plants, algae, and some microorganisms
ANSWER: Carbon Dioxide
-Coal actually burns more than one gas, but out of all the choices, Carbon Dioxide is the only one that's true.
Lol, Hope this Helps!!
