The study of chemicals and bonds is called chemistry. The study of layers of earth is called petrology.
The correct answer is mentioned as follows:-
What is earth crust?
- The Earth’s crust is its lightest, most buoyant rock layer.
- Continental crust covers 41percent of the Earth’s surface, though a quarter of that area is under the oceans.
According to the question, Regions of the seafloor with positive magnetic anomalies were found during times when the earth's magnetic field had reversed polarity.
Hence, the correct answer is mentioned above.
For more information about the earth crust, refer to the link:-
https://brainly.com/question/7932885
