Science — AI-generated practice question

Tooth decay is caused by bacteria acting on sugars to produce acids. These acids demineralise the tooth enamel. Bacteria and food particles form dental plaque, which covers teeth so saliva cannot neutralise the acid. Toothpaste helps by removing the plaque through brushing, preventing acid formation and thus protecting the enamel from decay.

Source: Chapter 5, Section 5.2.4 — "More to Know! Dental caries"

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• The key points examiners expect: (1) bacteria produce acid from sugars, (2) plaque blocks saliva from neutralising acid, (3) brushing with toothpaste removes plaque before acid is produced.
• Toothpaste itself isn't explicitly mentioned in the passage beyond brushing, but the question implies brushing with toothpaste = plaque removal — mention that connection.
• Do not write about digestion or other topics; keep the answer focused on dental caries only.