Which is considered a boundary between two different fronts?

cold front

neither warm front nor cold front

both warm front and cold front

warm front

Both warm front and cold front is considered a boundary between two different fronts.

Option C

Explanation:

When the cold front and warm front come into play, they give rise to a weather front. The cold front is formed from the edge of cold air mass whereas warm front from the vice versa.

When both the cool and hot air meet each other the boundary that gets created between is the weather front. In other words, the temperature and humidity of the masses are different which results in the weather front. Different weathers get formed as a result of such fronts.

answergeosphere;

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.