Answer:
Preliminary Research is research on a topic that helps you get a better understanding on what types of sources are available and what is being said about a topic. This type of research helps solidify a topic by broadening or narrowing it down.
Answer:
Passive voice is more an inversion of meaning than an inversion of syntax. That's because the grammatical subject of the sentence (heart) is still at the beginning of the sentence and is still followed by the verb. In other words, standard subject + verb order prevails.