Final answer:
Approximately 22% of precipitation falls back onto the land, which is part of the Earth's hydrologic cycle where water is evaporated, condensed, and then precipitated.
Step-by-step explanation:
The question asks about the percentage of precipitation that falls back onto land. Based on the information provided about the water cycle and the distribution of water on Earth, we can infer that not all precipitation falls on land; a substantial amount falls back into the oceans. Among the choices given, the correct answer is that approximately 22% of precipitation falls back onto land. This figure takes into account the overall distribution of water retrieved from the atmosphere through the hydrologic cycle, which comprises evaporation, condensation, precipitation, and eventual runoff that returns to the oceans.