Sedimentary rock. It takes a REALLY long time to have them made (by nature, of course)
Some steps that helps scientist to focus the purpose of an investitagation are there hyposthesies and the clues that they found to there investigation.
Hope this helps:)
It’s a 7 there’s a cell membrane, cytoplasm, nucleus, vacuole, chloroplasts, Mitochondria, and a cell wall. Good luck !
