What's the context?
The industrial revolution
Even further back...
The agricultural revolution
Trade?
Communication?
Travel?
Exploration?
Answer:
I think a hot-air balloon
Explanation:
You can't really go many places in a hot-air balloon
Answer:
the Greeks, Byzantines, Ayyubids, Mamluks and Ottomans – the ... Medieval Arab historians say that the history of the citadel as a fortified acropolis began under Nicator. In ...
Explanation:
I am not 100% sure but I think the answer is A.
