Central and state governments influence each other in O a unitary system. O a federal system. a confederal system. a democratic system.

The correct answer is the federal system. Power is shared between the two governments and states have the right to make their own laws as long as they're not unconstitutional or against the federal law. Federal law applies to all the states in a federation, like the United States has in the congress.

or b on edge

please give brainlist

the correct answer is b, "fertility rates are increasing, so populations will grow more quickly in the future."