The correct answer is higher!
(alrernatively "more" would also be ok, but not "more high")
The only correct form of comparative for high is "higher".
A landslide is any geologic process in which gravity causes rock, soil, artificial fill or a combination of the three to move down a slope. Several things can trigger landslides, including the slow weathering of rocks as well as soil erosion, earthquakes and volcanic activity. (I gooogled this sorry if it doesn’t help, it might help you cancel out some answers tho)
Academic writing more frequently focuses on understanding different audiences
Ed is the only suffix i think