Answer:
a fossil that is useful for dating and correlating the strata in which it is found.
Explanation:
Maybe D I hope it helps you
It is the nucleus that contains DNA and controls the functions of the cells
Answer:
These are things that won't be going away. Natural gasses and fossil fuels will likely run out someday or become much harder to find. When you use these sources of energy, they won't be going away and therefore will be sustainable because we can always continue using them.
Does that make sense?
Explanation:
It's a summarization of useless cash spendings, sorted by date.
