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if you are in danger of drowning, what is the first thing you should do?

a.
breathe through your mouth.

b.
allow yourself to sink in the water.

c.
float on your back.

d.
remain calm.

Answer in a couple of paragraphs, 1 or 2 at the most if anything! 20 points + brainliest--> explain what all the systems in your body do to work together < --list of systems needed: circulatory systemrespiratory systemdigestive systemexcretory systemnervous system