Question

what is animation? how many types are there?

Answer 1

Types of animation in computer science....
Traditional Animation. (2D, Cel, Hand Drawn)
2D Animation. (Vector-Based)
3D Animation. (CGI, Computer Animation)
Motion Graphics. (Typography, Animated Logos)
Stop Motion. (Claymation, Cut-Outs)

Answer 2

animation is the process of  designing, making layouts and preparation of photographic sequence which are integrated in the multimedia and gaming products . animation involves the exploitation and management of still images to generate the illusion of movement . a person who creates animation is called animator. he/she use various computer technologies to capture the still images and then to animate these in desired sequence.
types of animation;
1. traditional animation.
2.stop motion animation 
3.computer animation.
4.2d animation.
5.3d animation.