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A low pitch sound example would be like a crocodile. They can produce sound so low for the human ear to hear. Thunder can also produce exceptionally low pitched sounds that are felt much as they are heard.
In the sentence “The accountant desires to be honest rather than rich”, the type of verbal is “infinitive”. The infinitive form of a verb is preceded by the preposition “to” which in this case is “to be”.
A gerund is a verbal acting as a noun and it is form by “verb+ing”. A participle is a verbal acting as an adjective and it is formed by past form of verb. So in this case the only answer that applies is “infinitive”
A dependent clause adds something to a sentence but cannot be a standalone sentence, hence "dependent." In this sentence, "when I had... phone" is a dependent clause.