The correct answer is: first level.
Maslow's hierarchy of needs is a theory in psychology that is represented by hierarchical levels of human needs within a pyramid. There are five levels of needs:
1. Physiological (food, water, rest..),
2. Safety ,
3. love and belonging (friends, intimated relationships),
4. esteem (feeling of accomplishment),
5. self-actualization (achieving your own potentials).
Answer - Ground water erosion is a type of carbonic acidic water. That goes into the holes thru the soil and pretty much cracks thru rocks.
Its often referred to as the colon
It might be an astrocyte, but I'm not sure.
The root would be the appropriate answer
