Answer:
Gene expression is like the recipe book for making proteins in our cells. It's how the instructions in our genes get used to create those important proteins our bodies need. In the interactive, gene expression probably talks about how the genetic code is read and turned into RNA, and then that RNA is used to build proteins. It might show how things like the environment or changes in our cells affect how our genes work. The interactive might let us see how genes can be switched on or off and how that affects what our bodies do. It's like seeing how our genes control traits or diseases and how they help our bodies function.