Even though it is slums we are talking about, and we know how terrible the conditions are, still there's always some surprises (negative ones unfortunately). Specifically in Mumbai, it is surprising that big portion of the people living in the slums do not have access to city services, they do not have enough water even thought the city itself is surrounded by water, more then half of the population of Mumbai lives in slums (around 55%), most of the residents do not have toilets and have to pay for public toilets...
Answer:
Option: clearing the land to raise crops.
Explanation:
Agriculture first to practice by Neolithic people who shifted from hunting-gathering. During the Neolithic Age, humans invented new tools for farming that helped them to plough the land and clear unwanted weeds and plants. The cultivation included crops of wild which transformed into domestic. As they indulged in agriculture, they began living in one place rather than moving from one place to another in search of food. Animals were also domesticated who served them as companionship in the wild surrounding and food for survival.