Due to their location in the andes which civilization built many roads and bridges to stay connected? a) aztec b) inca c) mayan d) olmec

The answer is B) Inca. Extensive road network across plains, deserts and mountains reaching all corners of the empire was one of the notable features of the Inca empire like terraced farming, canals, crop rotation and irrigation as agricultural innovations. It allowed smooth military operations, trading, and the use of runners or chasquis.

C.about 10% i think

Magma is outside the volcano  and lava is inside the volcano.