Generate a sentence that answers this question: "Coal mines are an essential for what industries?".

Answer: coal mine is a source of coal under the ground

Generate a sentence that answers this question: "If a deer is unable to eat regularly, or only eats that which lacks essential minerals, the deer may".

Answer: an animal requires enough nutrients to maintain good health

Generate a sentence that answers this question: "When the earth shades part of the moon at night it's called".

Answer:
the phases of the Moon change the appearance of the Moon