What conclusions do you think liz made about the cause of population declines in marine iguanas?

Liz may have have concluded two possible reasons on the population declines of marine iguanas in the Galapagos Islands. One, it has something to do with the changing climate conditions (El Nino phenomenon) in the islands. The weather conditions have affected the algae that the marine iguanas eat. And two, the changing climate conditions are held responsible in the increase in the population of hawks that feed on the marine iguanas. 

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