The past does not mirror the future, so modern states can mirror the Persian Empire, not the other way round.
Responsible modern states try to achieve good government, security and prosperity for their peoples. This is what the Persian empire tried to do, setting a good example for the present.
However, like the present states and their wars and failings, the Persian Empire had limited success, and its prosperity attracted the covetous eyes of the Macedonians. Phillip II planned to take it over, and prepared and an invasion. His son Alexander took over the project after Phillip was assassinated, and destroyed the Empire before he himself died/was killed, and the Empire was split up amongst his generals.
The Ancient Persian Empire originated in what is modern-day Iran.
Iran.
This question is confusing, but I believe the answer would be Iran. Iran is the modern-day country where the Persian Empire originated and where Farsi, a descendant language of ancient Persian, is spoken today.
Persia (modern Iran).
Iran
The Persian Empire covered many countries, but was primarily based and organized in the modern state of Iran.
The seven modern countries which would've been located in the Persian Empire include Syria, Iraq, Iran, Afghanistan, Turkey, Bulgaria and Pakistan. The Persian Empire ruled much of the Middle East from 500 BC through the 1960s.
Persepolis.
It was centred in Iran, and stretched from Libya to Pakistan.
None - the Persian empre stretched from Libya to Central Asia which covers many modern countries, none of which is 'most' of that vast area.
The religon originated in what was the Persian Empire. Most modern adhernets are Persian in ethnicity but may orginate from either Iranian or Indian diasporas
A Persian Empire existed in various forms from ancient times until the early twentieth century when it was renamed the Empire of Iran. The Empire of Iran was replaced with the Islamic Republic of Iran in 1979. At it's greatest extent the Persian Empire under Darius the Great ruled all of modern Iran, Afghanistan, Iraq, Syria and Turkey.