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.

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced