What is the most important roman contribution to western civilization?

Iwill be giving 15 points to whoever answers the concept of checks and balances means that each branch of governmenta. has its own powers and responsibilitiesb. is clearly described in articles of the constitutionc. has the ability to correct the other branches in case of an errord. is set up so that in case of constitutional crisis, the governement will continue to operate

Brainliestttme : describe the following event: increase in islamic extremism in the middle east

Who memorized the design for the water frame in order to smuggle the plans to the united states? a) james hargreaves b) edward cartwright c) samuel slater d) richard arkwright