Dirty slums is the correct answer for what blots the maps of the slum children. The slum children have to face a number of challenges and difficulties in their daily lives. The condition of the slums they live in is one of the major factors that affects their overall well-being and development.

The dirty slums where these children reside can have a significant impact on their lives, and this is why it is the correct answer to the question. Here's a detailed explanation of why dirty slums blot the maps of the slum children:

1. Unsanitary conditions: Dirty slums are characterized by poor sanitation and hygiene. The lack of proper waste management systems results in the accumulation of garbage and waste in and around the slum areas. This leads to unhygienic conditions, which can contribute to the spread of diseases and infections among the slum children.

2. Health hazards: The presence of garbage, sewage, and stagnant water in the slums poses serious health hazards for the children living there. These conditions attract disease-carrying insects, such as mosquitoes and flies, which can transmit diseases like malaria and dengue fever. The lack of clean water and proper sanitation facilities further exacerbates the health risks for the slum children.

3. Limited access to education: The presence of dirty slums can also affect the educational opportunities available to the slum children. The lack of proper infrastructure and facilities in the slum areas can make it difficult for these children to attend school regularly. Additionally, the unhygienic conditions in the slums can lead to frequent illnesses, which can further hinder their educational progress.

4. Psychological impact: Living in dirty slums can also have a negative psychological impact on the slum children. The constant exposure to poverty, filth, and unsanitary conditions can lead to feelings of hopelessness, low self-esteem, and a sense of being trapped in a cycle of poverty. This can affect their overall mental well-being and hinder their ability to break free from the cycle of poverty in the future.

In conclusion, dirty slums have a significant impact on the lives of slum children. The unsanitary conditions, health hazards, limited access to education, and psychological impact all contribute to blotting the maps of these children. Addressing the issue of dirty slums and improving the living conditions in these areas is crucial for ensuring the well-being and development of slum children.