What reason brought about European exploration

The age of exploration was caused by the discovery of the Americas in 1492, although European exploration was still popular beforehand, this was due to the Marine Silk Road. Which linked various silks and spices from Asia to Europe.

Hope that helps,  :)

polling is a process and the outcome is not involved in the process itself.

the outcome, which is an unfavorable rating for a particular candidate is not affected by the mechanical process of polling.

it rather depends on the number of people voting in favor of the candidate.

this is an outcome of people's preferences.

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.