HELP PLZ

What directive in source a might have been at the root of the action described in source b?

Which geographic process is shown in this chart? (3 points) redlining gentrification filtering ghettoization suburbanization

Ineed asap! ! what is the name of the system in which each branch of the u.s government can limit the actions of the other branches? a. perpetual union b. division of powers c. cooperative federalism d. checks and balances