Why were merchants considered the lowest class in the Medieval Japanese hierarchy?

"people looked down on them was because they were selling things that other people had made, and taking money from other people in a dishonest way."

Explanation:

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances

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.