What happens as genes are passed on from parent to offspring over many generations?

This passage from chapter 4 of story of my life is an example of which story of plot

Read the excerpt from the dark game: true spy stories from invisible ink to cia moles. yet, by the time robert e. lee surrendered to ulysses grant at appomattox, virginia, some four years later, about 620,000 soldiers had died on the battlefields, more than american battle deaths in all other wars from the revolution through the vietnam war. what is the author’s primary purpose for including this detail? to inform readers about the differences between three military conflicts to persuade readers of the seriousness of the american civil war to entertain readers with tales from behind the lines of battle to encourage readers to visit battlegrounds in appomattox, virginia

During the industrial age, what was one important way businesses told consumers about new products? through phonographs through telephones through telegraphs through catalogues