Answer:
The fall of the city removed what was once a powerful defense for Christian Europe against Muslim invasion, allowing for uninterrupted Ottoman expansion into eastern Europe.
Explanation:
A - it taught him how to lay railroad tracks with steel
Answer:
eastern and southern Europe
Explanation:
scientific theory is an explanation of some aspect of the natural world that can, in accordance with the scientific method, be repeatedly tested, using a predefined protocol of observations and experiments.
