Answer:
The sentence that is not written in parallel structure is the following one: I love Brazilian Jiu-Jitsu, snowboarding and to read.
Step-by-step explanation:
Parallel structure, also called parallelism, is the repetition of a chosen grammatical form within a sentence. By making each item follow the same grammatical structure, you create a parallel construction.
In the sentence above, there are three elements coordinated by the conjunction and. When you connect two or more clauses or phrases with a coordinating conjunction, you should use a parallel construction. That is to say, all the parts of speech should be the same. In this case, the elements coordinated are NPs (noun phrases) that function as the direct of the verb to love. However, the phrase to love is not an NP but a VP (verbal phrase). To correct the error of faulty parallelism, you should replace that VP with its corresponding NP (reading). Consequently the revised version of the sentence would be as follows: I love Brazilian Jiu-Jitsu, snowboarding and reading.