question: Given the fact "plants are a source of oxygen through photosynthesis", what is the answer to "Mammals can breathe thanks to"

answer: organisms with roots

question: Given the fact "all minerals are formed by natural geological processes", what is the answer to "Things occurring in stoney areas produces all of these:"

answer: materials such as talc

question: Given the fact "a flashlight requires a source of electricity to produce light", what is the answer to "Flashlights require batteries"

answer: to properly illuminate objects

question: Given the fact "the slope of the land causes a river to flow in a particular direction", what is the answer to "If a river is flowing down the east side of a hill, then the hill"

answer:
drops sharply right there