Concept:Rural-urban drift is the movement of people from villages to towns or cities.Explanation:Rural-urban drift takes many young adults and family heads away from rural areas.Their spouses and dependants remain behind in the rural home.Prolonged separation or abandonment can weaken family ties and lead to broken homes in rural areas.Slums, streetism, and environmental degradation are mainly problems created in urban areas, not rural areas.Answer:D. increased incidence of broken homes.