Fluoride is a mineral that is added to public drinking water supplies in much of the United States in order to reduce levels of tooth decay. When a tooth is forming, fluoride strengthens the enamel, or outside coating of the teeth. The fluoride mixes with the enamel, making it harder. In addition, when fluoride mixes with saliva, it can protect teeth from sugars, further reducing tooth decay. The Centers for Disease Control (CDC) states that drinking fluoridated water provides additional protection even for people who simply brush with fluoride toothpaste. Reports on the impacts of fluoridated drinking water have concluded that it reduces tooth decay by about twenty-five percent. The text structure used in the above paragraph is:

A)Sequence
B)Compare and Contrast
C)Cause and Effect
D)Problem and Solution
Description

Cause and effect

Explanation:

You can rule out sequence since it's not really telling a story

It's not Compare and Contrast because it's not stressing the importance of water with fluoride or without fluoride in the water

It's not Problem and Solution because water without Fluoride was not an issue, simply a precaution.

Leaving C) as our answer, this shows the effects of Fluoride in our drinking water and how it affects the population.

Hope this helps!

the speech this question is referring to is president kennedy's special message to the congress on urgent national needs, may 25, 1961

kennedy responds in a very direct and concrete way to those thinking that communism is a positive system:

"yet their aggression is more often concealed than open. they have fired no missiles; and their troops are seldom seen. they send arms, agitators, aid, technicians and propaganda to every troubled area. but where fighting is required, it is usually done by others--by guerrillas striking at night, by assassins striking alone--assassins who have taken the lives of four thousand civil officers in the last twelve months in vietnam alone--by subversives and saboteurs and insurrectionists, who in some cases control whole areas inside of independent nations." (kennedy)

president kennedy presents communism as cowardly, as a hidden and treacherous weapon that strikes from the shadows like thieves, he represents the system as not even being capable of showing and open and overt attack or confrontation. to finish up the response, he expresses that the system attacks even a country's idependence and freedom.

i believe it may be the hope this sorry if i'm wrong.