In which phenomenon does earth's magnetic field play an important part?
a
retaining gases around earth to form the atmosphere
b.
stratifying the atmosphere into layers
c. movements of tectonic plates
d. spreading of the sea floor
e. deflecting cosmic rays

A . retaining gases around Earth to form the atmosphere  ... gravity

B.  stratifying the atmosphere into layers ... gravity

C. movements of tectonic plates ... gravity & buoyancy

D. spreading of the sea floor  ... gravity & buoyancy

E. deflecting cosmic rays ... Earth's magnetic field

the answer is a)

mark brainliest

i think they are all correct

explanation:

they seem good