1) Motion graphics use moving elements like animation and visual effects to tell stories through title sequences and advertisements. They have improved over time with technology allowing for more creative titles.
2) Visual effects alter images or add moving elements that can't be done in live action, like matte paintings used historically or modern CGI. Blue/green screens allow characters/objects to be placed in different backgrounds.
3) CGI uses computer software to generate digital visual effects and animation, improving over time. Early films like Tron combined live action with 3D animation, while Toy Story was the first fully CGI animated feature film.