Multiple choice general knowledge

What are the imaginary lines drawn on a map connecting places of equal height above sea level called?

  1. contours

  2. isobars

  3. isotherms

  4. isotopes

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A Correct answer
Explanation

Contour lines on maps connect points of equal elevation above sea level. Isobars connect points of equal atmospheric pressure, isotherms show equal temperature, and isotopes are variants of chemical elements - none of these relate to height.