What is the total percentage of Earth covered by water compared to the land?

The correct answer reflects widely accepted scientific data indicating that approximately 71% of the Earth's surface is covered by water, with the remaining 29% comprised of land. The choice that states the total coverage fits this general understanding best, as it resonates with common estimates used in geography and environmental science.

In terms of the given options, the percentage of approximately 75% water and 25% land aligns closely with the historical figure reported for global water coverage, though it slightly exaggerates the percentage.

Understanding these figures is crucial for discussions in environmental science, as they illustrate the significant role that water plays in Earth's ecosystems and climate. The imbalance also emphasizes the need for conservation efforts focused on both terrestrial and aquatic environments, given that water resources are a vital part of global health and sustainability.