kwebtoon1-9, Exercise 1: Ratings and rules

Model answer:

Rating change: the Webtoon article says webtoons were once rated All or 18; from May 2019 a rating system was implemented, with 10 platforms including Naver and Daum said to participate, and the ratings "expected to be" All, 12, 15 and 19 (18).
Uncertain: the wording is tentative ("it is said", "will participate", "expected to be"); the article does not confirm it came into force as described, name the platforms that joined or who set it up, and does not explain "19 (18)".

Online vs print (any two): the Webtoon article says online publication is under different censorship laws than print, leading to more erotic and explicit comics as webtoons; the Manhwa article says webtoons helped creators get around strict censorship; the Internet censorship article says explicit works are classed as "harmful media for youth", mostly webtoons, with mandatory age verification.
Not said: the name of any law, or a date for the classification.

Sources: Wikipedia, Webtoon; Manhwa; Internet censorship in South Korea.