Mary knows that pouring a liquid into a different shaped container does not change the amount of liquid. She can also reason logically, but she cannot handle abstractions such as proverbs. According to Piaget, Mary has probably achieved the stage of cognitive development.

answer:

third

Explanation:

answer; (you have the right of way);

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.