Answer: Stars?
Explanation: I think it is stars because there is only one star in our solar system. I don't know for sure if it is, but I think it is. Don't be too sure of my answer.
True because they are selecting and breeding for traits that will be best for survival
When a cold air mass moves toward a warmer air mass, it causes a cold front. The warm air rises, leaving colder temperatures in the region. On a weather map, a blue line with triangles represents the front.
Please look at diagram below.