Help me, please with these question

Aplane cuts a pyramid as shown in the diagram. what is the shape of the cross section? a. a hexagon b. a pentagon c. a square d. a triangle

Why did the belgian parliament pass laws to decentralize its government? a. to increase trade with neighboring luxembourg b. to decrease the political power enjoyed by the flemish c. to enable belgium to join the european union d. to reduce tensions between belgium's two main ethnic groups

In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements