Why did the author devote a section to explaining the science behind charcoal before explaining how charcoal has been made and used throughout history?

Which statement correctly describes the verb function in this sentence? the word “dancing” is a verb that functions as a noun. the word “dancing” is a verb that functions as an adjective. the word “becoming” is a verb that functions as a noun. the word “becoming” is a verb that functions as an adjective.

The author’s purpose for including this in the introduction is

Which source would be the most credible choice for researching the life of anne frank?