Q: Fact: shale can be metamorphosed into slate by increased pressure
Question: Slate probably formed

A: deep within the earth

Q: Fact: the amount of daylight is least in the winter
Question: On continents nearer the north pole than the south, winter months such as November see

A: short daylight

Q: Fact: humans eat crops
Question: Corn and wheat are among the favorite foods of

A: humans

Q: Fact: reproduction occurs during adulthood
Question: If a thing is procreating, then it is

A:
aged enough