Question 743Navigation General

The correct answer is B) the Gulf of Mexico. An air mass labeled "mTw" indicates a maritime tropical wet air mass, which originates over warm tropical waters such as the Gulf of Mexico. This type of air mass is characterized by warm, moist conditions due to the evaporation from the warm ocean surface. The other options are incorrect because the equator (A) is not a common source of air masses for the United States, Alaska (C) has a continental subarctic climate, and Canada (D) has a variety of air mass sources depending on the region, but the Gulf of Mexico is the primary source for maritime tropical air masses affecting the southern and central United States.