If water caused the huge outflow channels on Mars, what was the most likely process thatformed them?
A)rainfall from the hydrosphere
B)catastrophic but rare flooding
C)annual melting of the seasonal ice caps
D)large comets that struck Mars
E)heat from the impact of the large asteroid that made Hellas

Question

Quizplus · Accepted Answer

The presence of large outflow channels suggests that water flowed rapidly and in great volume over a short period of time. This process is most likely due to catastrophic but rare flooding, such as from the release of water trapped in subsurface aquifers. Rainfall and seasonal melting would not produce enough water flow to form such large channels. Large comets and the impact that made Hellas may have contributed to early Martian water, but would not be the primary cause of the outflow channels. The size and volume of the outflow channels suggest that they were formed by catastrophic flooding, likely caused by the sudden release of large amounts of water from underground aquifers or subsurface ice reservoirs. Rainfall and seasonal melting are not sufficient to explain the size and extent of the channels, and there is no evidence of cometary impacts or heat from an asteroid impact playing a significant role in their formation.

If Water Caused the Huge Outflow Channels on Mars, What