How does the magnetic field surrounding earth benefit humankind a it prevents magma from seeping out of the crust b it steers aircraft away from radiation belt c it protects us from radioactive particles d it draws more oxygen into the atmosphere

The magnetic field surrounding earth benefits humankind by providing a protective sheet around earth.

it prevents the entry of harmful rays, radioactive particles, to reach earth

It prevents the harmful rays and particles thus also shields the ozone layer which is the protective layer of our earth crust.

Correct

C it protects us from radioactive particles

a is the correct answer