Which sentence best describes the faulty parallel structure in this sentence? he aims to earn a little and spending less than he earns. the first aim is stated as an infinitive phrase. the second aim includes the conjunction than. the first aim is described with more words than the second. the second aim is described with a gerund instead of an infinitive

The sentence that best describes the faulty parallel structure of the given sentence above is, The second aim is described with a gerund instead of an infinitive. The first part of the sentence uses an infinitive which is "to earn". Therefore, the second should also be an infinitive, instead of a gerund. The correct sentence should be, He aims to earn a little and to spend less than he earns.