The answer Is B good Luck
Answer:
An index fossil is a fossil used to determine the age of the sediments in which it is found. When quickly approximating the age of new finds, an archaeologist looks at the rocks in which it is buried, as those sediments would have been on the surface at the time of the death of the pre-historic creature.
hope this helps
I believe it's A. Premature Birth (though they all seem pretty believable)
This is what I found for facts if you look at it and do a little research your self. https://spectrumlocalnews.com/tx/san-antonio/news/2019/06/06/what-s-next-for-lake-dunlap--what-we-know-and-what-we-don-t
By eating plants and other animals, because they obtain their carbon from food.
