Which phrase describes the element carbon-14?
decays at an unknown rate
found in an organism’s remains
forms from the breakdown of nitrogen-14
is measured to determine the age of sedimentary rocks

answer; ///i believe its: ///(embolus);

c

explanation:

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes