Which is true?

a
Magnetic fields can only be broken by different rocks being produced by tectonic activity
b
The green region cannot have been made naturally and could only have been placed there artificially
c
Magnetic fields are formed in different areas in different plates, showing that those must be multiple plates in that area
d
Magnetic fields are always formed in strips. The broken green strips indicate that the plates that make up the region have moved

d

Magnetic fields are always formed in strips. The broken green strips indicate that the plates that make up the region have moved