The united states congress may pass laws, and they go into effect if the president signs the law. however the supreme court can declare a law unconstitutional. this is an example of

Checks and balance

Explanation:

Checks and balances is referred to as a system in the federal government that was developed and implemented in order to make sure no branch of government tends to become too much powerful. The individuals that gave the U.S. Constitution, also divided to a system that tends to divide the power in between three branches of United States government, i.e. executive, legislative and judicial.

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.