Harappan civilization forms an important landmark in the prehistory of the Indian subcontinent. The civilization offers an excellent example to the modern world in various ways. Their expertise in town planning, water management and harvesting systems as well as drainage mechanism is unparalleled.
For people to be free, so they themselves have equal rights.
Because Slate was more common in wet microclimates.
Hope I Helped :)
“ The rebels promised to provide laborers to help the United States build Panama Canal. “
B : Indians were discriminated against and had unequal rights.