Which of the following is true about the materials surrounding a protostar?

The materials surrounding a protostar play a significant role in the formation of planets, making this answer accurate. When a star is in its protostar phase, it is surrounded by a rotating disk of gas and dust, often referred to as the protoplanetary disk. This disk primarily consists of hydrogen, helium, and other elements and compounds, which can coalesce to form solid bodies and eventually planets, moons, and other celestial structures.

The materials in this disk provide the necessary building blocks for planet formation through processes such as accretion, where smaller particles collide and stick together to form larger masses. This interaction not only contributes to the development of various types of celestial bodies but also influences the dynamics and eventual architecture of the planetary system. The rich composition and dynamic interactions of material surrounding a protostar are crucial for the eventual emergence of a diverse range of planetary environments.