Explanation:

- E.W. Burgess: Famous for his "Concentric Zone Model" about cities, but did not give the concept of rural-urban continuum.

- Robert Redfield: Gave the concept of rural-urban continuum, especially through his studies in Mexico, showing gradual transitions between rural and urban communities.

- Louis Wirth: Known for works on urbanism and city life, but not the rural-urban continuum.

- Robert Park: Key figure in human ecology and urban sociology, but not famous for this particular concept.