Arelationship between instances of two entity types is a:
a. ternary relationship.
b. multiple occurrences.
c. unary relationship.
d. partnership occurrence.
e. binary relationship.

E - Binary.
Unary refers to single and ternary refers to triplicate. Binary refers to a duo or pair.

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada