The answer is b.)Cnidarians
The answer to this item is letter "B. prostaglandin". Prostaglandins are hormones which are created during a chemical reaction at the site of the injury. Therefore, each cell has the ability to synthesize it. They also regulate several important processes in the body.
Living things<span> require energy in order to survive.
living:</span>They are made up of cells; exhibit characteristics of life, like growth, movement, reproduction, response to stimuli; they evolve, and require energy for daily activities.<span>
Read more: </span><span>They are made up of cells; exhibit characteristics of life, like growth, movement, reproduction, response to stimuli; they evolve, and require energy for daily activities. </span><span>
Read more: They are made up of cells; exhibit characteristics of life, like growth, movement, reproduction, response to stimuli; they evolve, and require energy for daily activities.
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non living: </span><span>A </span>non-living thing is one that lacks or has stopped displaying the characteristics of life.