Because the environment cannot support a large population of people as large as the population in china currently
<span>Lowered cardio-respiratory fitness is one of the best predictors. By not being in shape and having a weakened heart and lungs, one stands less of a chance of surviving issues that arise in these systems. Including a small amount of exercise in one's routine can alleviate many of the risks inherent with this lack of fitness.</span>
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According to sources, the most probable answer to this query is that this type of neurodevelopmental disorder is more observed in children that in adults. Typically, adults would be diagnosed with an anxiety disorder called general anxiety disorder when ADHD progresses into adulthood. Thank you for your question. Please don't hesitate to ask in Brainly your queries.