Question

give reasons: topographical maps have grid lines red in colour

Answer 1

Answer:

here us your answer...

☑Red colour is used in the topographical map to show grid lines and their numbering, man-made features such as settlements, roads and cart tracks. Red: major highways, roads, urban areas, airports, special-interest sites, military sites, place names, buildings, and borders.

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Answer 2

Answer:

this is because to highlight it so that it will be easy to see and identify the particular place through the numberings on it.