Question

how did our solar system begin to form?
○ a large cloud of dust and gas began to expand under the force of gravity.
○ a large cloud of dust and gas began to contract under the force of gravity.
○ a large cloud of dust and gas began to expand under the force of magnetism.
○ a large cloud of dust and gas began to contract under the force of magnetism.

Explanation:

The formation of the Solar System is explained by the nebular hypothesis. A large cloud of dust and gas (a nebula) contracts under the force of gravity. Gravity is the force that causes the nebula to collapse, not magnetism, and contraction (not expansion) occurs as gravity pulls the material together, leading to the formation of the Sun and planets. So the correct option is the one with contraction under gravity.

Answer:

B. A large cloud of dust and gas began to contract under the force of gravity.