Question

how did louis sullivan and william jenney change the face of american cities in the late 1800s?
they invented the electrical connections that operated streetcars.
they built the coney island amusement parks that drew thousands.
they designed and built early skyscrapers.
they opened some of the first settlement houses.

Explanation:

Louis Sullivan and William Jenney were architects. Sullivan is known as the "father of skyscrapers" and Jenney designed the first modern skyscraper (the Home Insurance Building). Their work in designing and building early skyscrapers changed the urban landscape of American cities in the late 1800s. The electrical connections for streetcars were not their invention. Coney Island amusement parks were not their work. Settlement houses were related to social reform (like Jane Addams' Hull House) and not their domain.

Answer:

They designed and built early skyscrapers.