Answer:
The spread of iron-age farming was a crucial development in the history of ancient India as it led to the rebirth of urban civilization in the subcontinent. Cities grew up; trade expanded; metal currency appeared, and an alphabetical script came into use.
Explanation:
The middle ages primarily focused on religion, and not science, but the scientists which were present in the middle ages focused on astronomy a lot.
Answer:
Near the Black Sea
Explanation:
It is hypothesized that the proto-Indo-Europeans were a group of people who lived in the steppes of present-day Ukraine, this hypothesis is derived from the linguistic reconstruction of Indo-European languages that are languages that comprise the majority of current languages in Europe and some Iranian and Hindi languages, as well as others.
From this place these people expanded through Europe and part of Asia, this hypothesis is supported by some archaeological and genetic findings in populations present in the territories where languages derived from the proto-Indo European are spoken.