Question

1. match the definitions with the terms. a compound or salt of the element fluorine something done to prevent or avoid a type of skin cancer a behavior that has become common due to its repetition

Explanation:

1. A compound or salt of the element fluorine is a fluoride.
2. Something done to prevent or avoid is a preventive measure.
3. A type of skin cancer could be melanoma for example.
4. A behavior that has become common due to its repetition is a habit.

Answer:

1. Fluoride
2. Preventive measure
3. Melanoma (or other skin - cancer types)
4. Habit