An ecosystem is most likely to return to its original condition after which of these happen? a. tall prarie grass burns after being struck by lightning. b. flood waters erode the banks of a narrow stream. c. a marsh is filled in to make space for a new parking lot.

Achemist who studies water samples did a demonstration of how to test for lead in water. she added a clear solution of potassium iodide to a clear solution of lead nitrate. then a yellow swirling solid formed in the liquid. what is most likely true about the yellow solid?