Question

the ______ theory suggests that the interstellar dust within a nebular cloud is the most important component of planet formation.
comet
condensation
nebular
big bang

Explanation:

• The comet theory is about comets, not planet formation from nebular dust.
• The condensation theory states that interstellar dust in a nebular cloud is key for planet formation (dust particles condense and accrete to form planets).
• The nebular theory focuses on the nebula collapsing to form a star and planetary system, but the specific emphasis on interstellar dust as the most important for planet formation aligns with condensation theory.
• The big bang theory is about the origin of the universe, not planet formation.

Answer:

B. condensation