Answer:
1. Synoptic - presenting a common view
2. Eyewitness - a person who testifies to what he has seen
3. Treatise - a formal, systematic essay or book on some subject
4. Sequel - a work that continues a story started in an earlier work
Step-by-step explanation:
1- A synoptic is a presentation of a story, event or situation that has points in common with other stories, events or situations. This definition arises from the synoptic gospels, which tell the same stories from different points of view.
2- An eyewitness is a person who may be aware of any circumstances relevant to the investigation and resolution of a criminal, administrative, civil or arbitration case, and who has been called to testify, because he or she has witnessed a relevant event.
3- The treatise is one of the literary forms corresponding to scientific works comprising discussions of any issue in the form of arguments, which aims to present a fundamental approach to the subject.
4- A sequel of a literary, cinematographic, televisual work, of a comic strip or a video game, is a work taking place in the same universe of fiction as the first work, and which tells a story taking place after that which is narrated in this original work.