I believe the answer is tertiary
Trace fossils include footprints, trails, burrows, feeding marks, and resting marks. Trace fossils provide information about the organism that is not revealed by body fossils. Trace fossils are formed when an organism makes a mark in mud or sand.
Answer: scientific theory is an explanation of observations or events that is based on knowledge gained from many observations or events.
Answer:
The flow of individuals in and out of a population introduces new alleles and increases genetic variation within that population. Mutations are changes to an organism's DNA that create diversity within a population by introducing new alleles.
I hope it's helpful!
It would be making soda I'm pretty sure
