How do nutritional needs change over time? a the number of calories needed increases throughout a person’s lifetime. b the number of calories needed increases from infancy to young adulthood. c the number of calories needed increases from young adulthood until old age. d the number of calories needed remains the same from young adulthood throughout old age.

The correct answer to your question is option B, the amount of calories needed increases until young adulthood. children need a lot more calories then adults because they are growing in many ways, so they need extra nutrients to keep their body healthy. once people reach young adulthood, they stop increasing the needed amount of calories because they have stopped growing. their brain and other organs are fully developed and their growth plates have closed, making them unable to grow any further so they do not need the extra calories and nutrients. 
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One health risk and the most important one is obesity, it can cause obesity since you are not leveling your food like you wont ever get full because your just snacking between foods which can also cause diabetes.hope this : )