I am pretty sure the answer is c
Answer:
D
Explanation:
Blood is pumped by cardiovascular, respiratory system breathing process takes in oxygen and breaths out carbon dioxide when the digestive system food process gives the body energy for this processes to be successful
Answer: Geologic time is divided into units. Major changes in the earth's surface or climate and the extinction of species help to divide the time scale into smaller units.
Explanation: Rocks grouped within each unit contain a similar fossil record.
