I WILL GIVE BRAINLIEST
What is the author’s purpose for writing "Your DNA at Work"?

to explain why cheetahs run very fast
to encourage readers to join a science club
to describe how proteins are produced
to motivate readers to become genetic scientists

the article:
Are you amazed by how fast a cheetah can run? Are you fascinated by how a spider can spin a strong yet beautiful web? What if you had one of these unique abilities? Alas, humans aren’t made to run over 60 miles an hour or spin large amounts of spider siIk. These abilities in humans are the stuff of graphic novels and superhero movies. Obviously, we are genetically different from cheetahs and spiders. But what do we mean by “genetically”?

When we say “genetically,” we are referring to genes. Each cell in the body has a complete set of genes, called a genome. A genome is an organism’s instruction manual. The genome contains a thorough set of instructions that determines an organism’s traits. Each living thing has a genome which tells what the organism will look like and how its body will work. For example, your genome determines whether your hair will be curly or straight and how tall you will grow. It even determines some of your personality traits.

Genes exist in chromosomes, which are in the nucleus of your cells. All the nuclei of the cells of your body contain the same genetic information. You’ve learned that genes determine what an organism looks like and how it will function through the synthesis of proteins. But not all of the genes synthesize proteins all the time. The genes are “turned on” when they are needed and “turned off” when they are not. For example, consider a muscle cell in your arm: only the genes for muscle cells are turned on, not the genes that determine your hair color. Likewise, in a plant leaf cell, only the genes for leaf cells are turned on, not the genes that determine the shape of the plant’s fruit.