Concept:Conventional symbols on maps are standardized signs that are universally understood due to international agreement.
Explanation:Maps cannot show real shapes of features like mountains or buildings. So, specific symbols are used to represent them.
These symbols include letters, colours, pictures, and lines. They save space and convey information clearly.
For example, blue shows water bodies, brown shows mountains, green shows plains.
All maps use the same symbols because there is an international agreement on their meaning. Hence, they are called conventional symbols.
Answer:D. symbols on which there is an international agreement regarding their use.