What type of physical weathering is caused when rocks scrape together, causing small pieces to break off?

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

What is one early technological advance that shaped culture? a the use of fire b the discovery of arable land c family units. d migration