Observen el mapa de la Hidrovia Paraguay-Paraná y respon- dan las siguientes preguntas (pueden ayudarse con un mapa de
América del Sur):
a) ¿Por qué paises pasa esta hidrovia?
b) ¿Qué ciudades comunica?
c) ¿Qué ríos desembocan en el Paraná y en el Paraguay?

Answergoogle earth; i believe this is the correct answer, plz check first;

Answer islamic scholars made advancements in technology, literature, philosophy, mathematics, astronomy, and the arts during this time period;

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!