Read the sentence below. The introductory phrase 'Although historically classified as a dwarf planet' acts as a modifier. To prevent a dangling modifier, the subject of the main clause must be the logical entity being modified. Fill in the blank with the single proper noun that correctly completes the sentence.
Answer:Although historically classified as a dwarf planet, 【Pluto】 remains a primary subject of study for astronomers seeking to understand the outer reaches of our solar system.
Answer
Pluto
The proper noun 'Pluto' is the correct answer because it represents the actual celestial body that is historically classified as a dwarf planet. Placing 'Pluto' immediately after the introductory modifying phrase ensures that the modifier clearly and logically describes the subject of the main clause.
Step-by-Step Solution
Key Concept
Identifying and correcting dangling modifiers by ensuring the introductory modifying phrase is immediately followed by the noun it logically modifies.