Speaking is an interactive process that involves producing, receiving, and processing information between speakers. It has characteristics like clustering, redundancy, reduced forms, and variations in rate of delivery, stress, rhythm, and intonation. There are five main types of speaking activities: imitative speaking which involves repetition, intensive speaking like read-alouds and question/answer tasks, responsive speaking through questioning and giving directions, interactive speaking such as role plays and discussions, and extensive speaking like oral presentations and storytelling.