Pick the most suitable answer from the choices below.
Why is the magnetic field considered Earth’s first line of defense in space?
Answer variants:
Reduces fish population
Direct exposure of life to dangerous radiation
Thousands of kilometers into outer space
Protects natural resources
Harmful charged and radioactive particles
1. Where does the magnetic field extend from Earth?
2. What does it prevent from reaching the surface?
3. What would happen without this first barrier?