What change made Byzantium more powerful?
Defensive walls were built around the city,
The region began to recover from civil wars,
The emperor seized more power from the military,
Constantine seized Christian churches and their wealth.

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

the apache were not receiving guns from the spanish.(a) is the correct

explanation:

i believe your answer is d)

impeachment is when a president is committing treason or doing shading acts while in presidendcy therfor he can be impeached   by congress