Helps blood clot and regulates your blood pressure

Renin

Explanation:

The amount of renin secreted by your kidneys can help regulate your blood pressure if it is too high or too low. When your kidney blood vessels narrow or have a clot, your kidney is less able to do its work.

answer; ///(c) i believe that the correct answer is ethnic relations bear many similarities across different global; good luck

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.