Light, genes and growth

How a person grows depends on several things at once. Genes decide a lot, such as how tall you could become and the shape of your ears. But genes work together with food, sleep and exercise: healthy meals, enough sleep and regular activity help the body grow well. The surroundings matter too: clean air, clean water and safe homes help people stay healthy. Nobody is better or worse because of the traits they inherit. One cereal or one juice cannot make a person grow; it takes many good habits over time. Scientists give explanations with a claim and evidence. Here is one about the steppe eagle: the claim is that the eagle’s broad wings (genes) and the food it finds on the way (environment) together affect how well it grows and survives. The evidence is that big wings let it glide, and well-fed birds are stronger.