3. What two processes were key to the formation of Spain? The Reconquista and dynastic unification
The Reconquista and the voyages of Columbus
The conquest of the Aztecs and the Inca
World conquest and trade

what are the choices? the multiple choices?

i will answer in the comments after the choices have been said.

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.

answer; ///attempts to change more than once behavior at the same time;

answer; early greeks were econimically stagnant and cut off from other near eastern civilizations;