The sentence that contains a faulty parallel structure is the sentence, "He exercised while I watch television." The wrong part of this sentence is that, the first verb uses a past form, and then the next verb uses the present form. It is using the conjunction "while" meaning both verbs or action happen at the same time. Therefore, the verbs should either be both past form or both present form.
The passage gives a brief overview of the history of mad cow disease. It details when and how it started, the spread of the disease, and the efforts taken to eradicate it.
It can expand your life span
Other ppl would start becoming more positive