Three strategies which local municipality is implementing in addressing lack of clean water are: First, Local municipality can fund reliable water projects that serve villages and schools. Next, dams and rain catchment system can also provide reliable source of drinking water. Lastly, train the community or educate about sanitation facilities and hygiene then multiply the impact.
Maturation is a threat to internal validity stemming from either long-term or short-term physiological changes occurring within the participants that may influence the dependent variable.
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What are physiological changes?</h3>
Ageing causes physiological changes in all organ systems. Arteriosclerosis develops, blood pressure rises, and cardiac output declines. Lung function is compromised, vital capacity is reduced, and expiratory flow rates are slowed.
Pregnancy causes a number of physiological changes in the mother, such as an increase in fat and total body water, a drop in plasma protein concentrations, particularly albumin, an increase in blood volume, cardiac output, and blood flow to the kidneys, and a decrease in blood pressure.
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An externality associated with a market can produce negative costs and positive benefits, both in production and consumption.
