Spinal bifida may result in a hernia of the spinal cord and its covering membrane protruding to the outside of the body. this condition is known as:

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."