The correct answer is D. During my week at camp, I scaled the climbing wall, built a fort, and jumped on the trampoline.
Explanation:
Parallelism occurs when the same grammatical structure is repeated in a sentence, which creates a parallel relation between different elements in a list as these are presented using the same structure and related to the sentence in the same way. In the case presented that describes the different activities someone did during his or her week at camp a parallel structure implies all the activities are introduced in the sentence using the same grammatical structure, for example, all the activities are presented using gerund (words ending in -ing), infinitive form ( "to" followed by a preposition) or simple past and this structure is the same for all the element during all the sentence. Considering this, the sentences that uses a parallel structure is "During my week at camp, I scaled the climbing wall, built a fort, and jumped on the trampoline" because this is the only sentence that uses the same grammatical structure (simple past followed by an object) to present all the activities or elements in the sentence which is the propose of parallelism.
<span>d. During my week at camp, I scaled the climbing wall, built a fort, and jumped on the trampoline.
Parallelism happens when there is a similar grammatical structure within a sentence or across a group of sentences so that there is a similar sound, meaning, or meter. It is important to use parallelism when listing actions. In sentence D, all of the activities in the list have the same structure. They all begin with a past tense verb (scaled, built, jumped) and end in a noun (wall, fort, trampoline). A is wrong because the first two verbs in the list end in -ing, but sleep does not. I should be: rock-climbing, mountain biking and sleeping. In B the first three verbs are all past tense, but skiing is not. It should be: swam, hiked, biked, skied. C is wrong because the structure is a verb ending with -ing followed by a noun. There is no verb before crafts in the list. It should be: playing soccer, riding mountain bikes, and making crafts. </span>
