Answer:
Hormones are like a messaging system that delivers instructions via the bloodstream to stimulate action.
Explanation:
Hormones fit this description to a T. The job of hormones are like messengers, delivering messages that exert an action that responds downstream. They are carried by the bloodstream to different cells in the body.
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Oceans produce approximately 80 percent of the oxygen our planet needs to support animal life. Pollution that reaches the ocean through dumping, oil leaks, runoff, and other processes interferes with that oxygen production and poses a real threat to the oxygen content in our atmosphere. If the oxygen content decreases, it is likely that carbon dioxide will increase. This could have dramatic consequences for life as we know it.<span> </span>
C. From the looks of fear and distrust, he would have guessed that before long his arrival would be the talk of the whole town. He saw nothing of all this. People with trouble do not look behind.