Generate a sentence that answers this question: "A bunch of lava that is sitting somewhere could create on its own".

Answer: a plateau is formed by a buildup of cooled lava

Generate a sentence that answers this question: "How many ecosystems does the earth contain?".

Answer: the Earth contains many ecosystems

Generate a sentence that answers this question: "Which is likely the least helpful for the good bacteria that help your body?".

Answer:
good bacteria grow on the skin