Preventable communicable, or infectious, diseases like malaria and HIV/AIDS account for millions of deaths in the world each year, especially in low-income countries. Noncommunicable, or chronic, diseases like heart disease and diabetes are having an increasing effect across the globe.
Because it looks nasty to them so they don’t wanna risk trying it and not liking it so they just throw it away.
Nutrients is the substance in food
The answer is Aerobic exercise (such as swimming, running, climbing)
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