What is the most evident primary energy driver supplying Earth's surface ecosystems?
Answer
Sunlight captured by photosynthetic organisms.
The Sun is cited as the most evident energy driver, as photosynthetic organisms capture solar radiation and convert it into chemical energy, forming the base of nearly every food web.

Related Questions
What are the three primary conditions fundamentally necessary for terrestrial biology?Why is liquid water often referred to as the universal solvent?What is the consequence if Earth orbited significantly closer to the Sun, similar to Venus?What protective role does Earth's atmosphere share with the magnetic field?What specific aspect of Earth's atmosphere is crucial for sustained life beyond simply having a gaseous layer?What is the most evident primary energy driver supplying Earth's surface ecosystems?How does internal geothermal energy contribute to long-term habitability?What is the common abbreviation used to represent the six key chemical elements essential for all known life on Earth?What unique characteristic of Carbon makes it the structural backbone for complex organic molecules?What is the primary function of Earth's magnetic field regarding the persistence of life?