Which of these factors has been a constant of urban life since the early 1900s?

a. an increasing population
b. suburb relocation
c. enclave creation
d. increasing industrialization

The Constance of urban life since the early 1900s has been a relocation of suburbs. Option B is correct.

The increasing population in urban areas pushed many people, specially the wealthy ones to the suburs were they could stay in a most tranquil place far way from the noisy and crowded big cities. So, it became a costum to be commuting to the town.

In 1950  60% on people lived in the central city and 40% livied in the suburbs.  By 1980 the percentages reversed with 40% living in the central city and 60% living in the suburbs.

B. suburb relocation

Explanation:

Suburb is a proper term of the urban geography, coming from the Latin suburbium, to designate to the residential zones of the urban periphery or outskirts; The characteristics of the suburban or suburban areas, in the sense that it is given in American urbanism, are determined by the social component of its population: young working-class people, who settle down in scattered minor multinuclei close to the city and communicate with good road systems towards the peripheries. The model of coexistence of social life is by friendships in public spaces, schools, squares, parties, etc., which gives uniformity to services and institutions and a quality of life of habitability superior to the city: green spaces, open landscape, etc., but transferring the same problems if planning is not taken care of and the factors that have caused the cities to decline are avoided, sometimes due to issues of social justice in relation to educational, health and leisure institutions, among others.

c-three

explanation:

legislative, executive and judicial

b.lincoln had the victory he wanted for emancipation