Final answer:
Tornado Alley is known for frequent tornadoes due to alignment with typical cold fronts and the jet stream during supercell outbreaks, not because of the presence of mobile home parks.
Step-by-step explanation:
Tornado Alley is located from Texas to Indiana. This area is notorious for its frequent tornadoes due to specific meteorological conditions. The main reason for this is two-fold. Firstly, this region aligns approximately with the typical orientation of strong cold fronts or dry lines as they move across the central United States. These front systems are the leading edge of colder air masses that push into warmer air, creating the potential for severe weather and tornadoes. Secondly, Tornado Alley aligns with the typical orientation of the jet stream during supercell outbreaks. The jet stream is a key driver of weather, and its path can influence where severe weather, including supercells, which are thunderstorms with a deep rotating updraft, will form. The juxtaposition of cold air from the north, warm moist air from the Gulf of Mexico, and the jet stream's dynamics foster an environment ripe for powerful tornadoes to develop. However, the claim that this region has the highest number of mobile home parks per capita is not a meteorological factor and has no bearing on the location or frequency of tornadoes. Therefore, when asked why Tornado Alley is located from Texas to Indiana, the correct answer is (d) only (a) and (b) are correct.