Answer:
D. Magnetic Field
Step-by-step explanation:
The Earth's magnetic field, also called the Earth's magnetosphere, is an area around the planet that is influenced by the energy field created by the earth's core magnetism, ie the magnetic field is the earth's system that is caused by the movement of ions in the core of the earth.
Earthly magnetism acts as a protective shield for the Planet. The energy lines that “exit” from the magnetic north pole towards the magnetic south pole divert particles emitted by solar winds from the earth's surface. The force of these winds could sweep the Earth's atmosphere into outer space, making life conditions on the planet unfeasible.
In addition, birds and other animals, such as worms, can perceive the Earth's magnetic field and use it as a reference for locomotion. Compasses, GPS's and other navigation instruments also use it as a reference. A compass pointer, for example, is made of magnetized material, which causes it to be influenced by the magnetic field and points to the earth's magnetic pole.