The Geology Club traveled to the Grand Canyon for their spring break. Their teacher explained that the layers of red color were caused by iron in the rock. What most likely caused the iron-rich rock to erode?

a
animals
b
wind
c
falling rocks
d
running water

It does not include any fruits or vegetables for student .

In 911, a group of vikings lead by rollo besieged paris and chartres. after a victory near chartres on 26 august, charles decided to negotiate with rollo. the talks were led by hervé, the archbishop of reims. this resulted in the treaty of saint-clair-sur-epte, which granted rollo and his soldiers all the land between the river epte and the sea. it also granted him brittany, "for his livelihood". at the time, brittany was an independent land which france had not been able to conquer. in exchange, rollo promised the king his loyalty and military assistance when needed. also rollo also agreed to be baptised and to marry gisela, the king's daughter. the territory given rollo is about the same as upper normandy.