Which is considered a boundary between two different fronts?

a) cold front
b) warm front
c) both warm front and cold front
d) neither warm front or cold front

C) Both Warm Front and Cold Front

Explanation:

Both warm and cold front when comes in the boundary they form a stationary front. In this condition the the two air masses (hot and cold) are incapable of displacing one another and the climatic condition remains static for sometime.  The weather in such condition remains cloudy and results in the fall of rain and snow.

sadness is not good

explanation:

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects