Answer:a posture disorder characterized by excessive curvature or arch in the lower back
Explanation:
Synergistic reactions, also called synergistic effects, are a type of chemical reaction where the combination of chemicals produces effects stronger than the chemicals would ever produce alone.<span> Synergistic reactions essentially magnify the power and potency of chemicals. These reactions may be dangerous, particularly when they involve potentially toxic substances such as alcohol.</span>
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I believe the answer is: . Unmarried, unemployed males who were less than 20 years of age
Risky behaviours such as using drugs before driving is much more common among people who felt no responsibility, typically if they are young. Older people tend to see that they need to take care of themselves to sustain their partner and children,