Final answer:
The phrase in question is a sentence fragment as it lacks a complete thought. It can be corrected by attaching it to a complete sentence or rewriting it to include a subject and predicate, thus forming a complex sentence.
Step-by-step explanation:
The phrase 'Which was designed in 2005' is a sentence fragment because it lacks a complete thought and does not constitute a complete sentence on its own. It is essentially a dependent clause without its main clause. To correct a sentence fragment, you can attach it to a complete sentence or rewrite it so that it contains a subject and a predicate.
For example, if the previous sentence was 'The committee approved the new layout', you could correct the fragment by combining it with this sentence, resulting in 'The committee approved the new layout, which was designed in 2005.' This method eliminates the fragment and creates a complex sentence.
In contrast, a run-on sentence occurs when two or more complete sentences are joined without proper punctuation or conjunctions. To fix a run-on sentence, you could use a period to separate the sentences, insert a semicolon, or use a comma followed by a coordinating conjunction. A comma splice is similar to a run-on sentence but specifically involves the incorrect use of a comma to join two independent clauses that could stand alone as separate sentences. To rectify a comma splice, you would also use a period, semicolon, or a coordinating conjunction.