Answer :
Answer:
Independent clause
Explanation:
A clause is defined as the grammatical unit consisting of a subject and a predicate. It may or may not stand as an independent unit to convey a complete thought. There are two major types of clauses employed in English grammar; independent or main clause and the subordinate or dependent clause. These two are joined in different combinations to form complex and compound sentences.
As per the question, the given sentence exemplifies an 'independent clause' as it contains a subject('Oliver Wendell Holmes') followed by the predicate('wrote 50 poems in 1830') and conveys an accomplished thought in itself and does not require a principal clause to complete its meaning.