In the passage, the author is primarily concerned with -
A. analyzing a complicated scientific phenomenon and its impact on the Earth's surface features
B. describing a natural phenomenon and the challenges its study presents to researchers
C. discussing a scientific field of research, the gaps in researchers' methodological approaches to it
D. comparing two distinct fields of physical science and the different research methods employed in each
Explanation: Passage এর শুরুতে একটি natural phenomenon (creation of magnetic field and events like surge in the outer core, tenpest) নিয়ে কথা বলা হয়েছে পরবর্তীতে এই phenomenon study করার ক্ষেত্রে Limitations এবং challenge এর কথা আলোচনা করা হয়েছে।]
