Merhaba is Hi... Turkum I don't know probably Turk Sizi seviyorum is I love you. I was In a Turkish school. I hope I helped you
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.
Option D is correct.
A synapse is the opening between neurons that neurotransmitters pass through.
C ........................i think