Almost All Life on Earth is Directly or Indirectly Dependent

Question

Almost all life on Earth is directly or indirectly dependent on
A)predation.
B)solar energy.
C)physical productivity.
D)human civilization.

Accepted Answer

Solar energy is the ultimate source of energy for almost all life on Earth, as it is captured by photosynthetic organisms and transferred through the food chain. Without solar energy, these organisms would not be able to survive and support other forms of life. Predation, physical productivity, and human civilization also play important roles in ecosystems, but they are not as fundamental as the availability of solar energy.