lana is about the right weight for her age and height. nevertheless, whenever she goes on an eating binge, she purges the excessive food by self-induced vomiting. it is likely that lana suffers from

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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