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　　Eating sweet foods produces acid in the mouth, which can cause tooth decay. (High acid levels are measured by low pH values)

　　Describe the information below and discuss the implications for dental health.

　　Sample answer:

　　The provided line graph illustrates the acid level in the mouth which is created by consuming sweet foods specifically sugar and honey and possibility of tooth decay because of this acid level. As is presented in the line-graph, the higher the acid level the lower the pH value and a pH level less than 5.5 is detrimental for the tooth and causes the tooth decay.

　　The given graph shows that the initial pH level of our mouth is 7 which begin to fall after consuming sweet foods. When we eat sweet item like cane sugar, the pH level drops to 3.5 in 5 minutes and remain in danger level (below pH level 5.5) for more than 30 minutes. Consuming fruit sugar drops the pH level nearly to 4 and remains in danger level for about 20 minutes. And finally when we eat honey, the pH level fall below 5 and it remains under risk level for about 13 minutes. As the low pH level means higher acidity and causes tooth decay, cane sugar among the mentioned three food items is the most harmful for our tooth.

　　(Approximately 186 words)

　　Alternative Answer:

　　The provided line graph shows the acid level of our mouth which is created from consumption of fruit sugar, cane sugar & honey and compares their effects on our tooth decay.

　　When the pH level in the mouth is above 5.5, acidity remains in such a level that teeth are unlikely to be in danger from decay. Sweet foods, however, cause pH in the mouth to drop for a time, and the longer the pH levels remain below 5.5, the greater the possibility for decay to occur. The illustration compares the fruit sugar, cane sugar and honeys, which are the most common ingredients of sweet foods, causes the pH level to drop below the danger level after 5 minutes.

　　Among these 3 sweet items, cane sugar decrease the pH level most quickly and causes to remain the level under the danger level for the longest period (over 30 minutes) and thus produce the greatest risk among the three. After consuming the cane sugar, the pH level drops to level 3.5 and remains there for over half an hour. On the other hand, fruit sugar causes the acidity level of mouth to fall under pH level 4 in 5 minutes and remains under threat level for 20 minutes. Finally the honey appears to be less risky among the three causes the pH level to drop to 4.7 in 5 minutes and proceed to above pH 5.5 level within 15 minutes of consumption.

　　In conclusion all of the sweet items possess the possibility of causing tooth decay and honey and fruit sugar are likely to cause less decay than the cane sugar does.

　　(Approximately 271 words)

　　(These 2 model answers can be followed as examples of standard answers. However, please note there are other good ways of writing possible good answer.)