Answer:
Louis SUllivan - Skyscraper
Fredrick Olmstead =- Landscape architecture
John Roebling - Suspension bridge.
Elisha Otis Elevators
Step-by-step explanation:
Henry Sullivan is referred as the the father of skyscrapers. He was american an american architect and critic of Chicago school.
Fredrick Law Olmsted was american Journalist, social critic and Journalist. He is called as the father of landscape architecture.He is famous for designing many parks with his partner Calvert Vaus.
Elisha Graves Otis -He was american industrialist and founded the Otis elevator Company. He also invented a safety device that prevented the elevators from falling.
Augustus Roebling was american civil engineer. He designed wire rope suspension bridges. Brooklyn bridge was also designed by him, it has been labelled as national historic landmark.