Flooding can ruin entire cities as they destroy homes, buildings, roads, and farmland. The effects of floods are dangerous and costly. Think of the ways cities prepare for floods in efforts to reduce damage. Which of these statements describes how reservoirs help reduce flood damages?

Question 14 options:

They are long walls built along bodies of water that contain rising waters.

They are large storage spaces used to hold and regulate the flow of floodwater.

They are large barriers constructed along waterways designed to control water levels.

They are paths of land next to rivers that must remain clear to allow floodwater to pass.

I think its the secon option

Explanation:

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.