The best description for the weather shown by the blue triangles on a line on a weather map is by the statement that a cold front can cause heavy rain, thunder, and lightning.
Answer: Option A
Step-by-step explanation:
The weather map consist of four symbolic color mathematical features. The blue colored triangle represents the cold front. Red colored semi circle, on the other hand, represents the warm front. Then there are some complex symbols, such as the purple colored line with semi circle and triangle drawn in the same side, this represents the occluded front.
Then similarly, purple colored line drawn with semi circle on side and triangle drawn on the other side, represents the Stationary front. Therefore, here the blue colored triangles on a line represents the cold front can cause heavy rain, thunder, and lightning.