Final answer:
The formation of hail is influenced by atmospheric conditions such as large buoyancy and moisture convergence, both of which can fuel the thunderstorms responsible for hail generation.
Step-by-step explanation:
The question "Which increase hail? A) Large buoyancy B) src wind C) moisture convergence D) pressure fall" pertains to atmospheric conditions that can lead to the formation of hail. Hail formation is related to the intensity of precipitation, which is linked to weather phenomena such as thunderstorms. One of the key factors that contributes to hail formation is a strong updraft within a thunderstorm, which can happen due to large buoyancy as hot air rises. This buoyancy is a result of the temperature difference between surrounding air and the rising moist air, leading to an increased buoyant force on the warm air that rises and cools to form hail. Additionally, aspects like moisture convergence, which is the accumulation of moisture in a region of the atmosphere, can fuel the development of the thunderstorms that generate hail.