We use urainium to date the remains
Vacuoles are essentially sacs surrounded by a membrane. They are used by cells as temporary storage sites. They often store food, enzymes, and other materials needed by the cell, and some vacuoles store waste products.
Stratovolcanoes seems to fit, but I do not know what the list of answer choices is. Hope this if helpful :)
The answer would be D. Precognitive psychology
Maybe biosphere and geosphere?
