The correct answer is D) to preserve the mystery of its creation.
The reason Mary Shelley does not explicitly describe how the creature in Frankenstein is brought to life is to preserve the mystery of its creation.
An important moment in any story in when the author let the reader imagine a situation, a process or the conclusion of something. It creates mystery and promotes interest in the reader. In this case, Shelley did so. She does not explicitly describe how the creature in Frankenstein is brought to life is to preserve the mystery of its creation.
Mary Shelley (1797-1851) wrote “Frankenstein; or, the Modern Prometheus” in 1816, but was published until 1818.